They are usually the most irritating line of defense and the body's reaction to a potential contaminant.
For example, when one touches poison ivy, the body will release histamines to react to the allergen. A blotchy red patch will appear on the skin (possibly several). An anti-histamine, like Benadryl, can help clam these symptoms.
If you found this especially helpful, I'd appreciate if you'd vote me Brainliest for your answer. I want to be able to assist more users one-on-one, as well as to move up in rank! :)
