Redness in the tip of the penis

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What could this be? I'm so scare of cancer... its been about 3 weeks since appeared and it hasn't healed and every time I masturbate it turns red with a little sore, any ideas?

sex history?

24y/o virgin

Can you describe your sore?

have you notice any change on when you need to pee?

it doesn’t always hurt, its like a friction wound sometimes hurts when I pee, after washing the glans or after masturbation but basically everything is fine when I pee, months ago the glans was very sticky, with some white stuff, though what worries me right now is that part which its only de half of the tip, that is red, I’ve waited 2 weeks with no masturbation but today, after masturbation I noticed that this would its not healing

Do you apply anything to your penis when you masturbate?

Do you feel any post ejaculatory pain/ burning?
Or any pelvic pain/ pain in scrotal region?
Right now it seems like urethra has swollen/ inflamed. It could be due to many possible reasons including stds/ urine infection/ prostate infection.

Please visit a doc if you dont have any pelvic/ scrotal pain, it will be resolved within days