A stye is a condition in which oil glands in your eye lids become inflamed forming a painful lump containing pus. Styes are usually caused by bacterial infections, a clogged oil gland or long-term inflammation of the eye lid. The most common symptoms of a stye include itching sensation, sensitivity to light, tenderness of the eyelid, swelling, redness and tearing of the eye. Styes generally do not require any treatment and heal on their own over time. Styes on the outside of the eyelid turn yellow and release pus and heal faster. However, internal styes may take slightly longer to heal. You can warm compresses over your eyes to help release the pus. If the stye is caused due to an infection, your doctor may prescribe antibiotics. Do not attempt to burst or drain the stye, and refrain from wearing contact lens and makeup until healing has occurred. Styes can be prevented by taking extra care of your eyelids to avoid accumulation of germs and bacteria.