There is a higher chance that the rash that breaks out when you sweat is cholinergic urticaria, and the etiology is related to an increase in body temperature in the center of the skin.
Cholinergic urticaria is a limited edema that occurs in the mucous membranes of the skin and is a cause of urticaria, which is most common in atopic people. Due to exercise, stress, alcohol consumption or intake of overheated diet, the body temperature in the center of the skin rises, prompting cholinergic nerve impulses to release acetylcholine, which acts on mast cells and develops, with triggers including hot baths, exercise, and hot weather.
The main manifestation of the patient is a small, extremely itchy or even tingling masses, accompanied by headache, tearing, nausea and other symptoms in severe cases, preferably in the trunk and the proximal end of the limbs.
Sweating rash can also be seen in prickly heat, skin allergies, eczema, sweating herpes and other patients, affected by sweat, sweat duct obstruction or triggered by skin allergies and other leading to the onset of the disease, it is recommended that the patient to seek medical examination, a clear diagnosis, cooperate with the doctor for treatment.