Itchy face at night may be caused by dry skin, mosquito bites, contact dermatitis and other reasons. 1. Dry skin: The sebum decreases and water evaporates after the skin is over-cleaned, which in turn can lead to excessively dry and itchy skin. In the daytime when busy with other things, the symptoms of itching is easy to be ignored, in the evening when the spirit of sleep relaxation, you will feel the itching obvious. 2. Mosquito bites: If the patient’s face is bitten by mosquitoes at night, there will be red bumps on the face and itchy phenomenon. In addition, if the bed sheet and bedding are damp or not cleaned for a long time, it will breed a lot of mites, which will also cause itchy face at night. 3. Contact dermatitis: Itchy face at night may be caused by contact dermatitis, if patients use irritating cosmetics before going to bed, there will be symptoms of itchy face, accompanied by erythema, swelling, burning sensation and so on. Patients with symptoms of itchy face at night, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor to clarify the cause of the disease and then treatment.