Red painful bump on eyelid corner. i thought it may have been allergies because i scratched my eyes after playing with cat but it won't go away?

Depends on corner: Could be a stye or internal hordeolum especially if it's on the outside corner. Warm compresses will help but sometimes this needs to be evaluated if it doesn't go away in 10 d or so. If towards the inside (near the nose) other possibilities exist. Same rules for follow up with a doc apply

Infection: Have this issue evaluated. It may be an abscess judging by your history.

Stye?: If it is on the eyelid, it is probably a stye, please see your doctor for an antibiotic ophthalmic ointment. In the meantime, warm compresses with wash cloths, 1/2 strength no tears baby shampoo with water lid scrubs with qtips or clean wash cloths twice daily. No more scratching. You may try an OTC product for eye allergies, if you want.

May just be a sty: A sty is an infected secretory gland in your eyelid. This common infection results from blocked glands within the eyelid. When the gland is blocked, the oil produced by the gland backs up and extrudes through forming a lump (chalazion), which can be red, painful, and nodular. Frequently, bacteria can infect this blocked gland. Apply a warm compress or washcloth to the affected area 4-6 x/day.

See your doctor: Let your doctor take a look to see if you are having an infection versus an injury. She will prescribe the type of cleansing you need to use for your eye as well as any possible medication.