Excessive pubic hair in men may be a normal physiological phenomenon, or it may be caused by the vigorous secretion of sex hormones in the body, or hereditary reasons. 1. Normal physiological phenomenon: After male puberty, the level of androgen rises, which will lead to secondary sexual characteristics. In addition to the knot in the throat and voice changes, there will be an increase in body hair. Therefore, long pubic hair this is a very common physiological phenomenon. 2. Exuberant secretion of sex hormones in the body: long pubic hair in men is usually due to the exuberant secretion of sex hormones in the body, which leads to obvious male signs. 3. Genetic factors: excessive male pubic hair may also be genetically related, caused by family inheritance or gene mutation. If you have any of the above symptoms, along with other discomforts, it is recommended that you seek medical attention for a clear diagnosis in order to avoid delaying your condition.