What is a yellow dot when you open your eyelids?

When yellow spots appear on opened eyelids, they may be caused by conjunctival stones, chalazion, or sty.

1. Conjunctival stones

This is mainly a degeneration product formed by epithelial cell accumulation and mucus concentration, often appearing as hard yellow spots on the conjunctiva. In most cases, these stones are multiple. When they protrude from the conjunctival surface, they may cause eye pain, eye irritation, and foreign body sensation.

2. Chalazion,

also known as a meibomian cyst, is a chronic, nonsuppurative inflammation of the meibomian glands. This inflammation is usually caused by secretion retention due to blockage of the meibomian gland outlet. In patients with chalazion, there are painless cysts on the eyelids, which may appear as white or yellow dots at the opening.

3. Sties,

also known as styes, are acute suppurative inflammation of the meibomian glands, mostly caused by bacterial infection. Symptoms of a sty include redness, swelling, heat, and pain at the affected area. The opening may appear as a yellow dot.