you can still treat it first before seeing the eye doctor. depending on your symptoms you could have a stye or a chalazion. the information below will tell you the difference. both are treated with warm wet compresses for 5 to 10 minutes up to 6 times a day. there are also over-the-counter treatments. don't squeeze it and avoid eye makeup or contacts until it's healed. if it doesn't get better after a few days then see your eye doctor. here's more information about styes and chalazia
do i need to go to a dr when sty is on inside of lower eyelid not outside?