What causes penis hair loss?

Hair, armpit hair, eyebrows and pubic hair are all appendages of the skin. No matter where the hair is located, it will go through three cycles, including growth time, regression period and rest period. When the hair falls off during the rest period, it is a very normal physiological state. However, the length of hair growth, regression period and rest period are different in different parts, and the proportion of hair loss per day is different. The pubic hair growth time is a few months, the rest period is two weeks, the growth time is much shorter than the hair, the rest period is also shorter than the hair. If not all pubic hair is shed, only a few pubic hair is shed every day, and the overall pubic hair number is normal, completely physiological state, no problem.