What causes black hair?

Black and purple penis hair may be prepuce incarceration, aseptic prostatitis, varicocele and other reasons, as follows:

1, prepuce incarceration

When the prepuce mouth is narrow, it may affect the blood circulation of the penis, resulting in black and purple penis hair symptoms.

2, aseptic prostatitis

infected by pathogens, pelvic floor nerve muscle activity abnormal caused by aseptic prostatitis, inflammation stimulation may appear black and purple penis hair phenomenon.

3, varicocele

patients due to varicocele venous return is not smooth, so that the scrotum varicocele vein formation tortuous expansion, may affect the blood circulation of the penis, resulting in black and purple penis hair symptoms.