Delayed Injection Site Reaction After Wrist Corticosteroid Injection

Diagnostic Considerations

Infection would typically occur within 5 days of injection or beyond 30 days, shows progressive worsening, may have fluctuant lymph nodes, and requires immediate treatment, as recommended by the Centers for Disease Control and Prevention (CDC) 1
Reactions that peak at 8-10 days post-injection and improve within 24-72 hours without treatment suggest hypersensitivity rather than infection, according to the CDC 1
The presence of fever, chills, or lymphangitic streaking would favor infection, as suggested by the CDC 1
Local findings such as fluctuance, purulent drainage, or severe pain on rest suggest infection, whereas pruritus and non-progressive erythema suggest hypersensitivity, as indicated by the CDC 1

Avoid topical treatments, such as salves, creams, ointments, or topical steroids, to the injection site, as recommended by the CDC 1
Supportive care, including rest, oral non-aspirin analgesics, and oral antipruritic agents, may be necessary, as suggested by the CDC 1
Re-evaluate the patient within 24-48 hours to ensure no progression, as recommended by the CDC 1
If infection is suspected, obtain cultures via swab or aspiration if purulent material is present, and start empiric antibiotics immediately, covering common skin flora, including Staphylococcus and Streptococcus, as recommended by the CDC 1

Antibiotics do not shorten hypersensitivity reactions, and their use may cause unnecessary side effects, as noted by the CDC 1