I developed a rash on my head three months ago, with blisters that can be pressed to release fluid, and it is extremely itchy.

Rashes accompanied by blisters and severe itching may indicate various skin conditions, such as eczema, herpes zoster, urticaria, or contact dermatitis. Among these, herpes zoster is caused by the varicella-zoster virus and commonly occurs in middle-aged and elderly individuals. Its characteristics include clusters of blisters appearing in nerve-distributed areas, accompanied by severe nerve pain. Eczema, on the other hand, is a chronic skin condition commonly seen in children and adults, manifesting as skin erythema, papules, blisters, erosion, exudation, crusting, and scaling.

Patients are advised to seek immediate medical attention for a detailed physical examination and necessary laboratory tests by a professional dermatologist to determine the exact cause. While waiting for medical consultation, patients should avoid scratching the affected area as much as possible to prevent worsening skin damage and increased risk of infection.