Darkish area on penis

Hi guys, a background before I start, I do masturbate 2-3 times a week and never have been in contact with anyone sexually ever. So, I started noticing a dark area after a single masturbate session. This area pains while stroking.

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Notice the discoloration, this should be evident now

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What could this mean? Should I visit a doctor?

Okay, there are two main areas or different types of issues that I am aware of that can cause this.
i.) the skin has developed naturally in this way, examples would be Penile Melanosis and Vitiligo; or
ii.) a condition of the skin has caused it to develop in this way and needs to be treated.
The health specialist most able to give you a definitive cause and to advise on potential treatment if it were required would be a Dermatologist
This is most unlikely to cause a severe issue, but the sooner you get a diagnosis the better the outcome would be for you. It is not linked to masturbation, in case you are wondering.

Thank you, I will get it diagnosed soon enough.

It would be useful for future readers of your Forum Post if you do an update once you have seen any medical professional about this …