For adolescents in the developmental stage, penis development can be promoted by strengthening nutrition, regular work and rest, enhancing exercise and maintaining emotional stability. For adults, the penis cannot develop twice. 1. Enhance nutrition: Avoid the bad habit of partiality and picky eating, and take a balanced diet. In particular, foods rich in vitamins, high-quality protein, calcium, zinc, iron and other nutrients play a very important role in promoting the development of the body. 2. Regular work and rest: avoid staying up late, sleep deprivation and other habits, and maintain more than eight hours of sleep a day. 3. Enhance exercise: active participation in physical exercise, such as jogging, hiking, etc., can promote the body’s metabolism, to promote the development of the penis also has certain benefits. 4. Maintain emotional stability: avoid nervousness and depression, and keep a positive mindset. For adults, the penis cannot develop twice. If you have any symptoms of physical discomfort, you should go to the hospital in time and consult a physician for guidance.