Pimples are generally referred to as acne, which may be caused by abnormal androgen levels, Propionibacterium acnes infection, and clogged follicular openings. 1. Abnormal androgen levels: Increased androgen levels in a little girl’s body can lead to enlarged sebaceous glands, increased sebum secretion, clogging of pores with oil and shedding of dead skin cells, resulting in acne. 2. Propionibacterium acnes infection: usually in the hair follicles and sebaceous glands of the skin, with the continuous development, sebaceous gland secretion increases, fatty acids and other components within the sebum are more suitable for Propionibacterium acnes to reproduce and grow, resulting in acne on the face of little girls. 3. Follicular opening blockage: when the surrounding cellular keratinization is abnormal, it will lead to the follicular opening to become smaller, blocked, narrow, sebum can not be discharged, and the accumulation of acne in the follicular opening. It is recommended that patients go to the hospital in a timely manner to clarify the cause of the disease, under the guidance of the doctor targeted treatment. At the same time, we should pay attention to skin care and cleanliness, and eat less spicy and stimulating food, which can help improve the symptoms.