Closed pimples on the face may be related to improper skin care, excessive oil secretion, endocrine disorders and other factors. 1. Improper skincare: If you can’t clean your face in time every night, it’s easy to retain cosmetics, dust and other debris, which will block your pores and cause your face to grow closed pimples all the time. 2. Excessive oil secretion: patients who are subject to genetic factors or their own conditions may lead to their own oil secretion is relatively more, if there is no timely cleaning as well as wiping, may cause the face of long closed pimples. 3. Endocrine disorders: such as polycystic ovary syndrome, will cause the body androgen levels rise, resulting in increased sebum secretion, can also cause the face is always long closed acne. There may be other reasons why your face is always covered with closed pimples, so it is recommended that you go to the hospital in time for a relevant examination to clarify the cause of the problem and then actively treat the symptoms.