Hard spots felt on the penis can be caused by circumcision, folliculitis, warts and other reasons. 1. Circumcision: For example, if you are circumcised or have a long foreskin, and the foreskin can’t be turned over for a long time and can’t be cleaned in time, it will lead to the accumulation of dirt around the coronary groove, which will lead to the situation that you can feel a small hard spot on the penis. 2. Folliculitis: When you don’t pay attention to the hygiene of your private parts, it is easy to cause the penile skin to be infected by bacteria, which leads to inflammation of the hair follicles. At this time, it is recommended to pay attention to the hygiene of the private parts, avoid scratching the affected area, so as not to aggravate the infection. 3. Condyloma acuminatum: usually have a history of unclean sexual intercourse, which leads to the occurrence of condyloma acuminatum. When acromegaly occurs on the foreskin and glans, it can lead to the appearance of hard spots that can be felt on the penis. As the condition progresses, localized erosion and bleeding may occur. Hard spots felt on the penis may also be the cause of penile sclerosis, etc. It is recommended to visit the hospital in time to clarify the cause of the disease to facilitate targeted treatment.