A small white bump along the eyelid, like the one shown in the image, is often caused by a blocked oil gland. These bumps are commonly known as a stye or milia and can appear suddenly, causing irritation, redness, or swelling around the eye.
In many cases, the bump is harmless and may disappear on its own within a few days. Warm compresses placed gently over the eye for 10 to 15 minutes can help reduce swelling and encourage healing. It is important not to squeeze or pop the bump, since that can lead to infection or further irritation.
However, if the bump becomes painful, grows larger, affects vision, or does not improve after several days, it is best to see an eye doctor. Persistent eyelid bumps can sometimes require medical treatment.
Keeping the eye area clean and avoiding expired makeup or rubbing the eyes can also help prevent future irritation.