Radioactive wrinkles outward from the corners of the mouth initially dry lips, erythema, edema, oozing and crusting at the corners of the mouth. When it becomes chronic, the local mucosal skin is moist, cracked, rough and flaky, and radiating wrinkles occur outward from the corners of the mouth. If caused by malnutrition, anemia, riboflavin deficiency can be accompanied by oral, tongue and pubic mucosal damage, such as glossy tongue, scrotal skin redness and corresponding systemic symptoms. Mostly bilateral symmetry, can also be unilateral onset. Self-conscious burning sensation. Malnourished children, the corners of the mouth and its surrounding pustules can appear, mostly related to pseudococcus infection. Then, how to cause radioactive wrinkles at the corners of the mouth outward? The following are the causes of radiating wrinkles outward from the corners of the mouth: Nutritional deficiencies Riboflavin deficiency, which can be accompanied by strawberry-like tongue and scrotal itching. Excessive labor, excessive physical exertion or debilitation, malnutrition, insufficient supply of iron, protein and a variety of vitamin deficiencies: such as niacin, vitamin B6, etc. can cause the disease. Infection: the pathogenic bacteria are mostly low virulence of Pseudococcus or Candida albicans, mostly seen in children. Certain skin diseases, such as: atopic dermatitis, seborrheic dermatitis unusually combined with dermatitis of the corners of the mouth. Salivary disease infiltrating the corners of the mouth can cause the disease; finger biting, pen biting, etc. can also cause the disease. Mechanical factors The teeth are not properly positioned, resulting in the upper lip overlapping the lower lip, the corner of the mouth folds, the mucosa is often in the impregnation.