Pressure urticaria is a rare form of hives that appears after the skin has been subjected to pressure. This often happens on the feet after prolonged standing, the buttocks after extended sitting, or areas where clothing is tight. These hives can develop hours after the pressure is relieved and typically persist for 8 to 72 hours. They may cause discomfort, itching, or a burning sensation, and can be accompanied by mild fever, chills, fatigue, joint and muscle pain, or headaches. Common triggers include pressure from using tools like screwdrivers or hammers, clapping hands, carrying bags or suitcases, engaging in sexual activity, and using tampons. Traditional antihistamines might not be effective, but nonsteroidal anti-inflammatory drugs (NSAIDs) or oral steroids can be used to manage symptoms. This condition is often chronic and can last for several years, with its exact cause still unknown.
