Suggest Treatment For A Small Red Bump On The Penis Head

Good evening. I received some blunt trauma to my penis today. Accidental, yes, but painful, obviously. I just got home and inspected, and noticed a small red dot (call it 1-2 cm) on the head. I have not noticed it before today, it is not raised, there is no discomfort, just a small red circle. The rest of inspection yielded nothing remarkable. I would just like to ensure that nothing is going wrong down there . I am sexually active but have not noticed a single thing and we are both each other s one partner with a guaranteed clean past history beforehand. Assuming this is from the trauma earlier, what should I keep in mind/look for?