Intralesional Triamcinolone for Acne Treatment

Indications and Efficacy

The American Academy of Dermatology recommends intralesional triamcinolone acetonide for treating individual inflammatory acne nodules and cysts, providing rapid improvement within 48-72 hours, as an adjuvant therapy for occasional stubborn lesions 1, 2, 3
Intralesional triamcinolone acetonide is effective for large, painful inflammatory nodules or cysts that are at risk for scarring, particularly stubborn individual cystic lesions resistant to other therapies, and situations requiring rapid reduction in inflammation and pain 1, 4, 5
Most acne nodules flatten within 48-72 hours after injection, providing rapid improvement in both inflammation and pain 1, 2, 3

The American Academy of Dermatology recommends using triamcinolone acetonide 10 mg/mL for nodular acne, which may be diluted with sterile normal saline to 5 mg/mL or 3.3 mg/mL 1
Using lower concentrations and smaller volumes minimizes complications 1, 4

Intralesional triamcinolone acetonide is not effective for patients with multiple lesions and should not be injected at sites of active infections, or in patients with previous hypersensitivity to triamcinolone 1, 3
Large injections should be avoided in those with active tuberculosis or systemic fungal infection 1

Local atrophy at injection sites is a consistent side effect, and hypopigmentation and pigmentary changes can occur 1, 2
Telangiectasias, hypertrichosis, sterile abscess, and steroid acne are less common but possible adverse effects 1
Repeated injections can suppress the hypothalamic-pituitary-adrenal axis, and anaphylaxis, angioedema, and urticaria are rare but possible 1
Using the lowest effective concentration and volume, and applying sparingly to skin folds and intertriginous areas can reduce the risk of adverse effects 1, 2, 4

Intralesional triamcinolone is an adjuvant therapy only, not a standalone treatment, and should be reserved for occasional or particularly stubborn cystic lesions 1, 4, 5
Patients with severe nodular acne, significant psychosocial burden, or scarring should be considered candidates for isotretinoin as definitive therapy, which achieves 90% lesion reduction in 81% of patients at 20 weeks 3, 4

The American Academy of Periodontology recommends topical anesthesia as optional for this brief procedure, though some practitioners apply it for 30 minutes if treating multiple lesions 6

Proper intradermal placement is confirmed by the formation of a visible papule with blanching, ensuring the medication stays within the target tissue, as recommended by the American Academy of Periodontology 6
The procedure should avoid high injection pressures or volumes, particularly in periocular areas, as rare cases of central retinal artery embolization have occurred with upper eyelid injections, according to the American Academy of Pediatrics 7

Patients should be advised to avoid direct sunlight and heavily scented facial products for 24 hours following the procedure, as suggested by the American Academy of Periodontology 6