Prickly, itchy feeling all over the body when sweating?

Please see below: This may be cholinergic urticaria : cu typically presents with a number of small, short-lasting hives but may also involve cutaneous inflammation (wheals) and pain which develops usually in response to exercise, bathing, staying in a heated environment, or emotional stress. Although the symptoms subside rapidly, commonly within 1 hour, cu may significantly impair quality.