Itchy red bumps on the face when it’s hot may be caused by cholinergic urticaria and solar dermatitis.
1. Cholinergic urticaria: a type of urticaria, mainly manifested as small and itchy dotted masses. The pathogenesis of this disease has not been fully clarified, mostly in sports, mental stress, hot weather, drinking hot food or alcohol after the onset.
2. Solar dermatitis: usually after strong sunlight exposure, the skin will appear itching, flushing, swelling, burning, red bumps and other symptoms, a small number of patients with serious conditions can also appear fever, nausea, vomiting and other symptoms.
When the day is hot, the face itchy red bumps may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination, clear cause, under the guidance of the doctor to give targeted treatment or treatment.