question: My 4 year old son has about 10 little whitehead looking bumps on the back of his knee and a few have turned red over the past few days. They do not bother him or even itch... I was wondering what I should try to put on it first before taking him to the Pedi. and of course if a topical is not working in a certain time frame then I would take him but would like to know what this could possibly be and what cream I should try. Thanks so much