It can get erect but becomes soft when wearing a condom.

Patient's question:

Male, 22 years old, can get an erection but becomes soft when wearing a condom, treated at Shenzhen Longhua Hospital

Doctor's answer:

Hello, this condition is likely caused by kidney deficiency. First, it's important to distinguish between absolute deficiency and relative deficiency. If it's absolute deficiency, dietary therapy can be used. However, if it's relative deficiency, it's due to yin excess. Since it's caused by excessive yin qi, it's necessary to expel yin. It's still recommended to take medication under the guidance of a doctor. Don't take anything randomly.
Of course, dietary therapy can also be used: Eucommia ulmoides waist flowers, fennel stewed kidneys, and goji berry, rehmannia, and Chinese yam porridge are all good dietary methods for tonifying the kidneys. For kidney yang deficiency, you can eat dog meat, lamb, chives, and loaches for dietary supplementation. Medications include Shenbao,, Jinkui Shenqi Pill, and Yougui Wan, among others.