I'm not sure if you're saying that your genitals look different than they did before, or if you're saying you have an injury?
Either way, we can't really tell you what this is, because we're not there in person and we're aren't doctors. So, the best plan is for you to see a healthcare provider in person and for them to have a look.
A doctor can't tell by looking if you masturbate, because masturbation doesn't cause physical changes. Masturbation is unlikely to have anything to do with whatever you're seeing - unless, of course, you hurt yourself while masturbating, but that's pretty unlikely anyway, and you would almost certainly have felt it at the time if you had!
Doctors really have seen and heard it all. So, whenever something feels super-personal or uncomfortable or embarrassing to us as the patient, it can really help to remember that for them, this is their ordinary everyday. Anything we tell them or show them, they've seen and heard before, and probably often.
You have a few options for getting healthcare. It depends what you feel most comfortable with and can access! You can, of course, see your GP. There are also sexual-health specific services, if you'd prefer. You might find that a sexual-health specific service is better able to make you feel comfortable and talk you through anything you want to know, as it's what they're particularly trained for. Brook
https://www.brook.org.uk/ is a sexual health service for young people, and if you're able to get to one of their locations, they'd be my first recommendation. If there isn't one anywhere near you but you'd like to go to a sexual health clinic, you can internet-search " sexual health clinic *town-name* " to find what NHS clinics are near you; some also have sessions only for young people.
Is there anything further we can help you with about this?
