My almost 3 year old sons penis is very red at the tip. he says urinating is painful and has been avoiding going to the toilet for the last few days, but i only noticed the redness today. do i need to take him in for a physical examination?

Possibilities: Occasionally young males will get either irritation from trauma or a localized infection from simple skin germs at that site. They will often find it easier to pee is a war tub of water if it is painful. Antibiotic ointment after cleaning the site with hydrogen peroxide will often heal the issue in a few days If not, contact his doc.