Hi. I haven't retracted my foreskin in a long time. I did after I felt some pain/discomfort under the penis foreskin expecially while it was erect. When I retracted enough to see the tip there was slight fingernail sized inflammation/ bruise underneath. Is it because I haven't cleaned there in a long time? What should I do?

I vaguely remember that when I was small (about 12 years old) an urologist had asked me to make sure I retract and clean thwrw often. I did there for sometime but then I ultimately forgot to. What should I do now?