There is a knot under the foreskin, which may be related to penile sclerosis, sebaceous cysts, penile scabies nodules and other causes.
1. Scleroderma: Fibrotic lesions of the corpus cavernosum of the penis caused by penile trauma, infection and other factors, resulting in the appearance of single or several hard knots on the dorsal or lateral side of the penis.
2. Sebaceous cysts: sebum cannot be normally discharged from the sebaceous gland orifices, which can lead to its accumulation in the glands, and can be manifested as hard nodules under the foreskin.
3. Penile scabies nodules: Because the scabies mite parasitizes within the surface layer of human skin, it can cause reddish or maroon bumps on the scrotum, penis and other parts of the body, which are a little hard to touch.
If you find a knot under the foreskin, it is recommended to go to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.