How can you treat a condition where skin puffs up or welts when scratched lightly?

The condition you are describing is called dermatographism, also known as skin writing. It is a common skin condition characterized by the formation of raised, red, itchy welts on the skin when it is scratched or rubbed. The welts typically appear within a few minutes of being scratched and can last for several hours.

There are several ways to treat dermatographism, including:

* Antihistamines: Antihistamines can help to relieve the itching and swelling associated with dermatographism. They can be taken orally or applied topically to the skin.

* Corticosteroids: Corticosteroids are a type of medication that can help to reduce inflammation and itching. They can be applied topically to the skin or taken orally.

* Calamine lotion: Calamine lotion can help to soothe the itching and inflammation associated with dermatographism. It can be applied topically to the skin.

* Cool compresses: Cool compresses can help to reduce the swelling and itching associated with dermatographism. They can be applied to the skin for several minutes at a time.

* Avoiding triggers: Certain triggers, such as stress, heat, and certain foods, can worsen dermatographism. Identifying and avoiding these triggers can help to reduce the frequency and severity of the condition.

If you are experiencing dermatographism, it is important to see a doctor to get a proper diagnosis and treatment plan.