Mosquito bites are more red after using glycerite lotion, which may be a normal physiological reaction or due to drug allergies. 1. Physiological reaction: after mosquito bites, saliva will be injected into the subcutaneous tissue, so that the body has an immune response and the phenomenon of redness and swelling of the skin. When using glycerine lotion, the immune response may still continue, so the skin will become redder. If there is no other discomfort, it is recommended to keep a close eye on the body’s condition and the drug’s effect for the time being. If the redness persists for a long time, you should consult a doctor in time. 2. Drug allergy: If the patient belongs to the allergic body, the use of glycerite lotion may also appear after the local skin redness. In this case, under the guidance of health care professionals, should be treated with loratadine, cetirizine and other anti-allergy drugs. Glycerine lotion can be irritating to broken skin and can be significantly painful, so it should be used as directed by a healthcare professional in order to avoid adverse effects on the area.