My son is 5, his right toe seems to be infected. how could i treat it at home? or do i need to see a doctor. it looks like hard yellow and then red

No home remedy!: First if all, I cang tell why his toe is infected- could be ingrown toenail , a splinter or other foreign body, because a 5 yo SHOULD NOT SPONTANEOUSLY GET INFECTED TOES! Untreated it is a short trip to the bone of the toe and can become chronic. Do not attempt to drain it yourself. Heat and antibiotics may be enough, but this isnt a call to make yourself. Treat colds and sprains at home, not this