Upper Arm & Leg Rash: Causes, Symptoms & Quick Relief - A Dermatologist's Perspective

Suspected condition: Cholinergic urticaria (heat rash)

Characteristics:

- Small, red, itchy bumps that appear on the skin after exposure to heat or sweating

- Typically occur on the upper arms, chest, and back, but can also affect other areas of the body

- Lesions are typically 2-3 mm in diameter and can appear in clusters

- Itching can be intense

- Lesions typically resolve within 30-60 minutes

Diagnosis:

- Cholinergic urticaria is usually diagnosed based on the patient's symptoms and a physical examination of the skin

- A skin biopsy may be performed to confirm the diagnosis

Treatment:

- Treatment for cholinergic urticaria typically involves avoiding triggers (heat and sweating) and using topical or oral antihistamines to relieve itching

- In some cases, oral corticosteroids may be prescribed to reduce inflammation