Pimples on the forehead of girls can be caused by diseases such as folliculitis and acne, or by the frequent use of cosmetics. In addition, girls who do not pay attention to personal hygiene, often eat spicy and stimulating foods and foods high in sugar can also cause acne on the forehead of girls. The girl should pay attention to the cleanliness of the face and eat a light diet, which can reduce the occurrence of forehead acne.