Wheals or nettles are small blisters, usually filled with lymph / wound water, which occur as an allergy feature or due to foreign body action (blisters from pressure sores or insect bites).
Wheals or nettles are small blisters, usually filled with lymph / wound water, which occur as an allergy feature or due to foreign body action (blisters from pressure sores or insect bites).