Sliding things inside the eye bags are usually due to chalazion or sebaceous cysts. 1. Chalazion: A cyst formed by the lid gland inside the eyelid. 2. Sebaceous cysts: cysts formed by the sebaceous glands in the skin of the eye. Both will form nodules in the eyelid area, which are usually painless, have a smooth surface, and slide inside the eyelid when touched. If left untreated, they can get progressively worse. Patients can go to the ophthalmology department of the hospital after examination, by the doctor to determine which condition is caused by, treatment, early can be treated by hot compresses to promote its subsidence. If it doesn’t disappear with conservative treatment of hot compresses, it can be removed through surgical treatment.