More and more blackheads may be related to excessive secretion of androgens, bad habits, dry skin and other factors. 1. Excessive secretion of androgens: excessive secretion of androgens can lead to excessive sebum secretion in the face, so that a large amount of oil accumulates in the pores, when the surface of the oil oxidation can form more blackheads. 2. Bad habits: Long-term late nights, lack of sleep, spicy and high-sugar diet, can cause a large amount of sebum secretion, and then block the mouth of the hair follicle, resulting in more and more blackheads. 3. Dry skin: due to the dry climate or lack of water, can lead to local skin dryness, so that the tissue around the hair follicle cells premature shedding, further clogging pores, can lead to more and more blackheads. When the blackheads are getting more and more should consult a doctor in a timely manner, under the guidance of a specialized doctor standardized treatment, will help early relief of uncomfortable symptoms.