Doctor insights on:
White Welts On Skin
Multiple causes: Welts or hives on the skin are usually triggered by increased allergy cell activation (mast cells) that release histamine. If present for less than 6 weeks, they can be secondary to medication, infection, food, or sting. If they last greater than 6 weeks, there is often no known cause or there can be an autoimmune etiology. ...Read more
Welts is another description of hive or swelling in the skin. They are pink, raised and with a vague border. The term welts is used more often for larger pinkish swelling in the skin, whereas , hives are often smaller pinkish swellings. Both are caused by histamine release in the skin which usually ...Read more
Dermatographism: Welting of the skin immediately following rubbing is called dermatographism or dermatographic urticaria (medical word for hives). It suggests that a cell population in your skin, called mast cells, are releasing histamine. It is seen in 4-5% of people. In most cases a cause is not discovered. If it bothers you, try antihistamines like zyrtec or Benadryl (diphenhydramine) (check interactions and contraindications). ...Read moreSee 1 more doctor answer
Dermatographia: Some people have really sensitive skin. If you scratch your skin, you will get a raised rash on the affected skin. There is nothing to do about this, aside from taking benadryl (diphenhydramine). Try writing words on your skin with your fingernails. If it works, you have sealed the diagnosis. Hope this helps! ...Read more
Dermatographism: When the skin is scratched, a hive develops. Most cases happen for no known reason, although it can be seen after one gets an upper respiratory infection, a medication, or collagen vascular diseases. Again, most common it comes for no known reason. Treatment is simple--take antihistamine every day (i.e. Zyrtec, claritin, (loratadine) allegra). Most will resolve with this. Take for 3 months and try stopping. ...Read more
When my skin is scratched by anything, it turns red and welts up. What can I do or take to prevent this?
Dermatographia: It sounds like you may have a condition known as dermatographia (literally "skin-writing"). In this condition, any little scratch can cause a local allergic reaction, which is the red welt you are seeing. If this is correct, it is often treated with antihistamines or topical steroids. You should be evaluated by a dermatologist or allergist. ...Read more
Could an alergic reaction trigger my daughter's skin to welt up every time she scratches her skin or gets scratched?
Possibly: But there is a condition called dermatographia where you can actually "write" on the skin and it will stay raised for some time. This is normal and not an allergy or problem. ...Read more
I am allergic/reactive to many things. A pen top dragged across skin causes welt for days. How can I get a skin test just the scratching will react?
See a dermatologist: Dermographism is a physical urticaria, not an allergy. Relax, don't worry about it. In time it will subside. You can write messages on your skin. If it bothers you, try zyrtec (cetirizine) (get the generic) 1 or 2 a day. No blood tests or allergy tests will help you. ...Read moreSee 1 more doctor answer