What it means
Wheals come from fluid leaking into the skin, often after histamine is released by mast cellmast selAn immune cell in the tissues that releases histamine and other chemicals during allergic reactions and inflammation.Full entry s in an allergic reaction or after an insect bite. Many wheals together are hives (urticaria). An intradermal injection, such as a tuberculin skin test, makes a small, pale wheal on purpose.
At a glance
| Spanish | habón |
|---|---|
| Also written | wheals |
Related terms
allergy
A reaction of the immune system to a substance that is harmless to most people.
lesion
An area of tissue that has been damaged or has changed from normal, such as a sore, wound, lump or spot.
mast cell
An immune cell in the tissues that releases histamine and other chemicals during allergic reactions and inflammation.
bulla
A large blister filled with clear fluid.