Causes and Management of Unilateral Epistaxis

Common Causes and Risk Factors

• Local trauma, such as digital manipulation or nasal foreign bodies, can cause unilateral epistaxis, requiring targeted examination and treatment based on the specific underlying cause, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 1
• Mucosal dryness and inflammation, often exacerbated by dry environments or nasal oxygen use, can contribute to unilateral epistaxis, according to the American Academy of Otolaryngology-Head and Neck Surgery 2
• Localized infection, such as rhinosinusitis, can affect one side of the nasal cavity and cause unilateral epistaxis, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 2
• Intranasal drug use, including topical medication overuse or illicit drug snorting, can affect one nostril and cause unilateral epistaxis, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 2
• Post-surgical changes, such as previous nasal or sinus surgery, can affect one side of the nasal cavity and contribute to unilateral epistaxis, according to the American Academy of Otolaryngology-Head and Neck Surgery 2

Diagnostic Approach

• Anterior rhinoscopy is an essential first step to identify the bleeding site after removal of any blood clots, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 3
• Nasal endoscopy is recommended for persistent unilateral epistaxis to thoroughly examine the nasal cavity and identify posterior bleeding sources, according to the American Academy of Otolaryngology-Head and Neck Surgery 3
• Assessment of risk factors, including medication use, bleeding disorders, and intranasal drug use, is crucial in managing unilateral epistaxis, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 4

Management Considerations

• Targeted treatment, including direct interventions to the specific bleeding site in the affected nostril, is essential in managing unilateral epistaxis, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 1, 3
• Nasal compression, applying firm sustained compression to the lower third of the nose for at least 5 minutes, can help control bleeding, according to the American Academy of Otolaryngology-Head and Neck Surgery 5, 4
• Cauterization, when a specific bleeding site is identified, should be restricted to the active site in the affected nostril, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 3
• Topical vasoconstrictors can be applied to the affected nostril to reduce bleeding, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 1
• Nasal packing, including resorbable packing, may be considered for patients with bleeding disorders or on anticoagulation therapy, according to the American Academy of Otolaryngology-Head and Neck Surgery 1

Systemic Factors and Red Flags

• Anticoagulant/antiplatelet medications may cause bleeding that manifests in one nostril first, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 2
• Coagulation disorders may initially present with unilateral epistaxis, according to the American Academy of Otolaryngology-Head and Neck Surgery 2
• Hypertension can exacerbate bleeding from a pre-existing vulnerable vessel on one side, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 2
• Associated symptoms, such as nasal obstruction, facial pain, or visual changes with unilateral epistaxis, may suggest a mass lesion, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 2

Epistaxis Causes and Management

Introduction to Epistaxis

• The American Academy of Otolaryngology-Head and Neck Surgery notes that epistaxis is often spontaneous without an obvious cause, but can be associated with digital trauma, nasal inflammation, foreign bodies, hemorrhagic disorders, use of anticoagulants and antiplatelet agents, and nasal vascular anomalies 6, 7

Epidemiology

• Epistaxis affects the population in a bimodal age distribution, with higher frequency in children under 10 years and adults between 70-79 years 8
• Patients over 85 years have 3.24 times more likelihood of attending emergencies for epistaxis than patients under 65 years 9

Classification and Causes

• The American Academy of Otolaryngology-Head and Neck Surgery states that epistaxis can originate from the Kiesselbach plexus in the anterior nasal septum, and common causes include trauma, inflammation, and foreign bodies 6
• Posterior epistaxis (5-10% of cases) originates from posterior sites in the lateral nasal wall or septum, and is more common in older patients, more difficult to control, and has a higher likelihood of requiring hospitalization 6

Systemic Causes

• Systemic causes of epistaxis include hematologic disorders (e.g. von Willebrand disease, hemophilia), liver disease, renal disease, cardiovascular disease, and hereditary hemorrhagic telangiectasia (HHT) 6
• Malignant hematology disorders can also cause epistaxis 10

Vascular Causes

• Hypertension is associated with epistaxis, with a reported prevalence of 24-64% in patients with epistaxis, although no causal relationship has been established 6

Special Considerations

• 45% of hospitalized patients with epistaxis have underlying systemic diseases that likely contributed to the bleeding 6
• 15% of patients with epistaxis are on long-term anticoagulation, 33% have a history of hypertension, and 0.9% have an underlying coagulation disorder 6

Initial Management

• The American Heart Association recommends that patients with epistaxis should sit with their head slightly inclined forward, compress the nasal fossae for 10-15 minutes, and seek medical attention if bleeding does not stop after 15 minutes of continuous pressure 11

Risk Factors and Management of Severe Epistaxis

Introduction to Risk Factors

• Advanced age itself dramatically increases epistaxis severity and complications, hypertension is independently associated with more severe bleeding requiring emergency intervention, and this age group has significantly higher rates of posterior epistaxis which is more difficult to control and carries greater morbidity, according to the American Academy of Otolaryngology-Head and Neck Surgery 12

Age-Related and Hypertension Risk Factors

• The American Academy of Otolaryngology-Head and Neck Surgery notes that elderly patients with hypertension are at high risk for posterior sources requiring endoscopic evaluation 12

Medication-Related Risk Factors

• Patients on warfarin require INR checking to evaluate therapeutic range, with supratherapeutic levels potentially requiring specialty consultation, medication discontinuation, or reversal agents for severe refractory bleeding, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 13, 14
• Antiplatelet agents (aspirin, clopidogrel) can cause persistent epistaxis, as demonstrated in case studies 15, 16

Additional Risk Factors to Document

• The American Academy of Otolaryngology-Head and Neck Surgery recommends documenting prior nasal or sinus surgery, nasal cannula oxygen or CPAP use, intranasal medications, personal or family history of bleeding disorders, and chronic kidney or liver disease as risk factors for epistaxis 12, 13, 14

Critical Management Considerations

• Routine acute blood pressure lowering is NOT recommended during active epistaxis, as excessive reduction can cause or worsen renal, cerebral, or coronary ischemia, according to the American Academy of Otolaryngology-Head and Neck Surgery 12, 13, 14
• Blood pressure should be monitored, with decisions about control based on bleeding severity, inability to control bleeding, individual comorbidities, and risks of blood pressure reduction, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 12, 14

Common Pitfalls to Avoid

• Do not aggressively lower blood pressure acutely, as this can cause end-organ ischemia in elderly patients with chronic hypertension, according to the American Academy of Otolaryngology-Head and Neck Surgery 12, 13, 14
• Do not overlook anticoagulation status, check INR if on warfarin and consider reversal for severe refractory bleeding, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 13, 14

Initial Management of Prolonged Epistaxis with Hemodynamic Concerns

Immediate First-Line Intervention

• The American Academy of Otolaryngology-Head and Neck Surgery recommends applying firm, sustained compression to the soft lower third of the nose for a minimum of 5 minutes without interruption, with the patient sitting upright and head tilted slightly forward to prevent blood from flowing into the airway 17
• The 30-minute bleeding duration meets the threshold for "severe epistaxis" requiring prompt management, as suggested by the American Academy of Otolaryngology-Head and Neck Surgery 17, 18
• Pallor and anxiety suggest possible hemodynamic compromise from blood loss, warranting urgent evaluation, according to the American Academy of Otolaryngology-Head and Neck Surgery 17, 18

Concurrent Assessment During Compression

• Check for tachycardia, hypotension, orthostatic changes, or syncope - any of these indicate significant blood loss requiring hospital-level care, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 17, 18

If Bleeding Persists After 5-10 Minutes of Compression

• Proceed immediately to anterior rhinoscopy after removing any blood clots to identify the bleeding site, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 17, 19
• Apply topical vasoconstrictors (oxymetazoline or phenylephrine spray) directly to the bleeding site, achieving hemorrhage control in 65-75% of cases through local vasoconstriction, according to the American Academy of Otolaryngology-Head and Neck Surgery 17, 20

Definitive Treatment Based on Identified Bleeding Site

• If a specific bleeding site is identified, perform nasal cautery after anesthetizing the area with topical lidocaine or tetracaine, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 17, 20
• Avoid bilateral septal cautery to prevent septal perforation, as suggested by the American Academy of Otolaryngology-Head and Neck Surgery 20

If Bleeding Site Cannot Be Identified or Bleeding Persists

• Proceed to nasal packing if bleeding continues despite compression and vasoconstrictors, using resorbable packing materials (Nasopore, Surgicel, Floseal) as first choice, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 17

Indications for Emergency Department Transfer

• The patient likely requires emergency department evaluation given bleeding duration >30 minutes, signs of hemodynamic instability, and potential need for posterior packing, endoscopy, or advanced interventions, as suggested by the American Academy of Otolaryngology-Head and Neck Surgery 17, 18

Differential Diagnosis Considerations

• Hereditary hemorrhagic telangiectasia (HHT) should be assessed if there is history of recurrent bilateral epistaxis or family history of recurrent nosebleeds, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 17, 19
• Coagulation disorders require documentation but should not delay first-line local hemostatic measures, according to the American Academy of Otolaryngology-Head and Neck Surgery 17, 19

Initial Management of Epistaxis

Immediate First-Line Management

• The American Academy of Otolaryngology-Head and Neck Surgery recommends positioning the patient sitting upright with head tilted slightly forward to prevent blood from flowing into the airway or being swallowed 21
• Firm, continuous compression to the soft lower third of the nose should be applied for a full 5-10 minutes without checking if bleeding has stopped, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 21

If Bleeding Persists After 5-10 Minutes of Compression

• The American Academy of Otolaryngology-Head and Neck Surgery suggests applying oxymetazoline or phenylephrine spray directly to the bleeding site after clearing any blood clots 21
• Anterior rhinoscopy should be performed after removing any blood clots to identify the source of bleeding, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 21 and 22

Definitive Treatment Based on Bleeding Site

• Nasal cautery is the preferred definitive treatment after anesthetizing the area with topical lidocaine or tetracaine, according to the American Academy of Otolaryngology-Head and Neck Surgery 21
• Restrict cautery application only to the active or suspected bleeding site(s) to minimize risk of septal perforation, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 22

Post-Treatment Management

• The American Academy of Otolaryngology-Head and Neck Surgery recommends applying petroleum jelly or other moisturizing agents to the nasal mucosa and prescribing regular saline nasal sprays to maintain mucosal moisture 21
• Follow-up should be arranged within 30 days to assess outcome, as suggested by the American Academy of Otolaryngology-Head and Neck Surgery 22

Special Considerations for This Age Group

• Nasal endoscopy should be considered if bleeding is difficult to control or recurrent, as elderly patients may have unrecognized pathology, according to the American Academy of Otolaryngology-Head and Neck Surgery 21 and 22
• Assess for hereditary hemorrhagic telangiectasia (HHT) if there is history of recurrent bilateral nosebleeds or family history of recurrent nosebleeds, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 21 and 22

Epistaxis Causes and Risk Factors

Local/Anatomic Causes

• The American Academy of Otolaryngology-Head and Neck Surgery notes that intranasal tumors should be suspected with unilateral epistaxis accompanied by nasal obstruction, facial pain, or visual changes 23
• Nasal vascular malformations are rare underlying conditions predisposing to bleeding, according to the American Academy of Otolaryngology-Head and Neck Surgery 23

Systemic Causes

• Primary bleeding disorders, including von Willebrand disease and hemophilia, should be documented in the history, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 23

Medication-Related Causes

• Direct oral anticoagulants (DOACs) are relatively new with limited reversal options, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 24

Critical Red Flags Requiring Further Investigation

• Ineffective treatments or recurrent bleeding despite appropriate management requires assessment for underlying conditions, according to the American Academy of Otolaryngology-Head and Neck Surgery 23

Management of Chronic Epistaxis Related to Nicotine and Stimulant Use

Pathophysiology

• Nicotine induces direct vasoconstriction and mucosal drying, making the anterior nasal septum (Kiesselbach’s plexus) especially vulnerable to recurrent bleeding. – American Academy of Otolaryngology‑Head and Neck Surgery 25
• High‑caffeine energy drinks can worsen mucosal dryness and cause transient blood‑pressure elevations, potentially aggravating epistaxis even in the absence of diagnosed hypertension. – American Academy of Otolaryngology‑Head and Neck Surgery 25
• Intranasal drug delivery (e.g., intranasal tobacco, cocaine) is identified as a major risk factor that increases both the frequency and severity of nosebleeds. – American Academy of Otolaryngology‑Head and Neck Surgery 25

Diagnostic Evaluation

• Anterior rhinoscopy after clearing blood clots is required to locate the bleeding source and exclude structural lesions, masses, or visible vascular abnormalities. – American Academy of Otolaryngology‑Head and Neck Surgery 25
• A detailed history of nicotine exposure (smoking, vaping, or intranasal products) should be obtained because intranasal delivery markedly heightens local mucosal injury. – American Academy of Otolaryngology‑Head and Neck Surgery 25
• Recording the onset, duration, frequency, and laterality (unilateral vs. bilateral) of epistaxis is essential for clinical assessment. – American Academy of Otolaryngology‑Head and Neck Surgery 25
• Evaluation should include inquiry about nasal oxygen therapy, CPAP use, and intranasal medications; intranasal corticosteroids raise epistaxis risk approximately 2.7‑fold. – American Academy of Otolaryngology‑Head and Neck Surgery 25

Indications for Laboratory Testing

• Coagulation studies are indicated when bleeding is severe, bilateral, recurrent despite appropriate local therapy, or accompanied by other bleeding signs, even if there is no known family history of bleeding disorders. – American Academy of Otolaryngology‑Head and Neck Surgery 25

Preventive and Counseling Measures

• Strong counseling for nicotine cessation is recommended, as continued nicotine use perpetuates mucosal damage and the risk of further epistaxis. – American Academy of Otolaryngology‑Head and Neck Surgery 25

Risk Assessment of Intranasal Illicit Drug Use

• Clinicians should specifically ask about intranasal cocaine or other illicit substances; these agents are a critical cause of severe epistaxis and can lead to septal perforation. – American Academy of Otolaryngology‑Head and Neck Surgery 25

Evidence‑Based Findings for the Differential Diagnosis of Epistaxis

Foreign Bodies and Mass Lesions

• Nasal foreign bodies are associated with unilateral epistaxis, nasal discharge, and foul odor in about 7 % of cases; bleeding occurs in roughly 30 % either from the object itself or during removal. The American Academy of Otolaryngology‑Head and Neck Surgery reports these prevalence figures. Evidence level not specified. 26

• Juvenile nasopharyngeal angiofibroma, which occurs in adolescent males, presents with unilateral, unprovoked, profuse epistaxis in 60‑76 % of affected individuals; thorough examination of the posterior nasal cavity and nasopharynx is mandatory when these symptoms appear. Recommendation from the American Academy of Otolaryngology‑Head and Neck Surgery. Evidence level not specified. 26

• Nasal malignancies commonly present with unilateral nasal obstruction in 66.7 % of patients and epistaxis in 55 %; lesions may be invisible on anterior rhinoscopy, and delayed diagnosis can lead to life‑threatening bleeding. Guidance from the American Academy of Otolaryngology‑Head and Neck Surgery. Evidence level not specified. 26

Posterior Epistaxis Characteristics

• Posterior epistaxis originates from the nasal septum in approximately 70 % of cases and from the lateral nasal wall in about 24 %; it is more frequent in older adults with hypertension, tends to be harder to control, and carries a higher likelihood of requiring hospitalization. Statement endorsed by the American Academy of Otolaryngology‑Head and Neck Surgery. Evidence level not specified. 26

Diagnostic Endoscopy and Red‑Flag Evaluation

• Nasal endoscopy is recommended for persistent unilateral epistaxis, recurrent bleeding despite treatment, or when bleeding is unusually difficult to control; the procedure localizes the bleeding source in 87‑93 % of examinations. Recommendation from the American Academy of Otolaryngology‑Head and Neck Surgery. Evidence level not specified. 26