You are only 25 years old and in your young adulthood. Nowadays, young people are generally well nourished and energetic, and there is almost no case of their kidney deficiency. It may be related to your life habits, such as frequent masturbation, sexual partners do not cooperate, less frequent life, long time sexual repression, mental tension, anxiety, stress, or often wear tight pants, lack of friction stimulation, resulting in abnormal sensitivity. You can try to abstain from sex for a period of time, do local massage stimulation, diet should be light, eat more warm yang tonic kidney food, less tobacco and alcohol, strengthen the body, you can do more squatting and anal lifting. Wear a condom when having sex or use some drugs to reduce sensitivity. If the problem is not relieved please go to the hospital in time, this disease is serious and can lead to infertility. If you still do not understand what, welcome to continue to follow up, I hope to help you, I wish you health!