Small cysts on the inner side of the eye may be eyelid sebaceous cysts, lid gland cysts, or bulbar conjunctival cysts, which can be observed if they are small, but usually need to be removed surgically if they are large. 1. Eyelid sebaceous cysts: These are hard nodular growths of the eyelid skin, adherent to the skin, movable, and require surgery for removal. 2. Blepharophalangeal cysts: caused by blockage of the opening of the blepharophalangeal glands secondary to the proliferation of granulation tissue, small ones can be warmed up, but large ones need to be surgically removed. 3. Bulboconjunctival cysts: translucent swellings under the bulboconjunctiva, usually with clear borders, requiring surgical removal. When there is a small cyst on the inner side of the eye, it is recommended to go to the hospital as soon as possible for a detailed examination to clarify the cause and follow the doctor’s instructions, so as not to delay the condition.