What causes non itchy hive like rashes that appear when the something rubs against skin?
The condition you're describing sounds similar to a skin reaction known as pressure urticaria, also known as pressure hives or dermographism. It is a type of physical urticaria, which refers to hives that are triggered by physical stimuli rather than allergens or immune responses.
Pressure urticaria occurs when the skin is subjected to pressure or friction, causing it to develop raised, itchy welts or hives. The reaction typically appears within a few minutes of the stimulus and can last for several hours. It is not contagious and usually doesn't pose any serious health risks, although it can be bothersome and uncomfortable.
The exact cause of pressure urticaria is not fully understood, but it is believed to be related to an overactive response of the body's histamine-releasing cells. When pressure or friction is applied to the skin, it can activate these cells, leading to the release of histamine and other inflammatory mediators. These mediators cause the small blood vessels in the skin to dilate and become leaky, resulting in the formation of hives.
Certain factors can increase the risk of developing pressure urticaria, including:
- Genetic predisposition: Some people may have a genetic tendency to develop pressure urticaria.
- Skin conditions: Certain skin conditions, such as eczema or dermatitis, can make the skin more sensitive and prone to developing pressure hives.
- Allergic reactions: In some cases, pressure urticaria can be triggered by an allergic reaction to a substance that comes into contact with the skin.
- Medications: Certain medications, such as aspirin, ibuprofen, and codeine, can also cause pressure urticaria as a side effect.
If you experience non itchy hive like rashes that appear when something rubs against your skin, it's advisable to consult with a healthcare provider or dermatologist for a proper diagnosis and management plan. They can rule out any underlying medical conditions and recommend appropriate treatment options to relieve your symptoms and prevent future occurrences.