Noticed Purple Colour On Penis Head While Masturbating. Reason?
Thanks for choosing health care magic for posting your query.
The penis become erect when the vein emptying the blood from the penis is constricted and doesn't allow the blood to release from the penis. This causes excessive collection of venous blood which leads to engorgement of penis and finally erection. This is a normal physiology.
Now the arterial blood is bright red in colour and the venous blood is dark in colour (purple/dark purple). This colour may vary occasionally and resultant chage in the erect penis.
This is the reason why your penis appears dark purple in colour when you are stroking it.
There is nothing to be concerned about unless:
1) The erection is painful.
2) There is failure in erection.
Until then, you can be comfortable.
If you are smoking these days, then stop smoking meanwhile.
Hope I am able to answer your concerns.
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Wish you good health,
Dr. Srikanth Reddy M.D.