Pimples on the face in the heat of the day refers to pimples or wind bumps on the face, which may be caused by cholinergic urticaria, acne, polymorphic sun rash, etc., and need to be analyzed according to the specific symptoms. 1. Cholinergic urticaria: mostly seen in young patients, mainly due to exercise, heat, emotional stress, eating hot drinks or ethanol beverages, the deep body temperature rises, prompting cholinergic nerve impulses and release of acetylcholine, which acts on the mast cells and the onset of the disease. It can be manifested in the face of round papules of wind, self-conscious itching, tingling or burning sensation. 2. Acne: the heat will make the sebaceous glands secrete too much oil, not cleaned up in time to build up clogged pores, when sebum, keratin plugs, etc. accumulate in the mouth of the hair follicle that is the formation of pimples, which can lead to acne on the face of the phenomenon. 3. Polymorphic sun rash: the onset of the season related, generally aggravated in spring and summer. It is usually aggravated in spring and summer and alleviated in fall and winter. It occurs in exposed areas. Often in the sun within 1 hour of conscious itching, a few days after the appearance of skin lesions. Lesions of various forms, common papules, papules, can also be manifested as edematous erythema or plaque. The patient’s self-conscious itching is significant. Caused by the heat of the day facial pimples or wind clouds of more reasons, should go to the hospital in time for examination and confirmation, under the guidance of the doctor for targeted treatment, so as not to aggravate the lesions.