Cold and shrinkage of the male pubic area generally refers to the phenomenon of penile shrinkage accompanied by coldness, which may be caused by physiological phenomena, endocrine disorders, trauma and other reasons. 1. Physiological phenomenon: after a certain period of time, the male penis will gradually shrink. Shrinkage will be manifested as a softening of the penis, a reduction in size, and may be accompanied by the phenomenon of coldness, which is a physiological phenomenon. 2. Endocrine disorders: with age, all organs of the human body will atrophy, while the function of the penis needs androgen to maintain, endocrine disorders will lead to a decrease in the level of androgen in the body, so it will cause penile atrophy. 3. Trauma: it may be caused by impact, striking, pulling, etc. It may damage the corpus cavernosum of the penis, blood vessels, etc., which can lead to insufficient blood supply to the penis and hypoxia. In the long run, the penis can appear cell atrophy, apoptosis phenomenon, thus causing the penis spongy body aging, the phenomenon of penile atrophy with cold. It is recommended that patients with penile atrophy with chills go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying the condition.