Premature ejaculation at the age of 15 may be caused by deficiency of kidney qi and insufficient androgen level due to excessive masturbation, or it may be caused by glans inflammation and glans sensitivity due to circumcision or circumcision, which can be clarified by further examination, such as blood test for androgen level and glans nerve sensitivity. If there is insufficient androgen level and deficiency of kidney qi, you can take oral medication such as Jin Kui Kidney Qi Pill and Wu Zi Yan Zong Wan for 4-8 weeks to effectively improve the symptoms. If there is excessive glans sensitivity, you can apply dacronin ointment, lidocaine gel for about a month of continuous treatment, can also effectively reduce glans sensitivity, can improve the situation of premature ejaculation. If there is a problem of overcircumcision or circumcision, you should do circumcision as soon as possible to help improve premature ejaculation after removing the trigger.