According to research, about 50% of men aged over 40 have some problems of maintaining hardness20.
It should not be all in your head. It is not just a part of aging that you have to accept. It is a real medical condition,
so it should be addressed like one.
If you think you have such symptoms, talk to a doctor.
「硬不了」並非完全為心理問題，亦並非必然的老化現象。
以下是一些關於
There are 4 levels of hardness. The most ideal is Level 4 which is complete hardness and full rigidity.
Levels 1 to 3 are considered insufficient hardness.
Try using the Hardness Score as a self-assessment tool to rate yourself12.
1
2
3
4
Many lifestyle factors that affect blood circulation, such as excessive drinking, lack of exercise and fatigue may contribute to this problem. Additionally, general stress, psychological factors and incidence of chronic disease are all linked to the occurrence of such problem7.