Lid problems refer to a variety of eye conditions that affect the eyelids. The most common lid problem is a stye, which is an infection of the eyelid caused by bacteria. Styes can cause redness, swelling, and pain in the affected area. Treatment for styes typically involves warm compresses and antibiotics. In some cases, surgery may be necessary to remove the stye. Other lid problems include blepharitis, which is an inflammation of the eyelids, and ptosis, which is a drooping of the upper eyelid. Treatment for these conditions may involve medications, lifestyle changes, or surgery.