L50.5

Clinical Causes: Increase in body temperature due to physical activity or hot environments Emotional stress or anxiety Consumption of spicy foods or hot beverages Exposure to heat or sweating Certain medications that affect body temperature regulation Other allergic reactions, though less common

Key Symptoms: Itchy skin or sensation of prickling on the skin Appearance of red or pale hives and welts Swelling in affected areas Flushing or feeling of warmth Burning or tingling sensations Episodes typically triggered by sweating or heat exposure Potential discomfort lasting from minutes to a few hours

Diagnosis Path: Diagnosis of cholinergic urticaria is primarily clinical, based on medical history and physical examination. A doctor might perform a provocation test involving controlled heat or exercise to observe for hives formation. Blood tests or skin prick tests are generally not necessary but may be used to rule out other allergic conditions. Accurate diagnosis is important to differentiate this condition from other types of urticaria or skin reactions.

Treatment Protocols: Use of antihistamines to reduce itchy hives and swelling Implementing cooling strategies during hot weather or exercise Avoiding known triggers such as spicy foods, hot environments, and strenuous activity Wearing loose, breathable clothing to minimize heat buildup Practicing stress-reduction techniques In severe cases, corticosteroids or other medications may be prescribed under medical supervision Keeping a symptom diary to identify specific triggers and patterns