The absence of pubic hair is mostly related to hereditary factors, and a small number of people are due to insufficient hormone levels, such as low secretion of sex hormones. Whether male or female, pubic hair will gradually appear after puberty, if there is no pubic hair before puberty, it is a normal physiological phenomenon, generally do not need to worry too much, and do not have to do special treatment. If there is no pubic hair in adulthood, it may be related to genetic factors, or it may be caused by insufficient hormone secretion. It is recommended that the patient first check the sex hormone six, and then check the chromosomes to observe whether there are chromosomal abnormalities. If there is no abnormality in the test results, the absence of pubic hair will not have a great impact on the patient’s normal life. It is recommended that adult patients without pubic hair go to the hospital for examination to clarify whether there are abnormal changes and timely treatment.