Vulval fixed drug eruption following trimethoprim use.

This case report describes an uncommon case of a woman who developed fixed drug eruption (FDE) on her vulval area secondary to trimethoprim use. She had no known history of drug allergy. Some common culprit medications that cause FDE include antimicrobials such as co-trimoxazole and non-steroidal anti-inflammatory agents. Vulval FDE is uncommon and should remain as an important differential diagnosis in women presenting with severe vulval pain accompanied by erythema and swelling, particularly after the introduction of a new medication. Discontinuation of trimethoprim along with the adjunct use of a steroid cream led to complete resolution of the patient's symptoms.