The difference between blepharitis and sty

Blepharitis can be divided into acute and chronic, of which acute inflammation is called sty, chronic called chalazion. Sties: eyelid gland acute, painful, suppurative, nodular inflammatory lesions, can be divided into external sty and internal sty, mostly due to staphylococcal infection caused by Staphylococcus aureus infection is the most common. Chalazion, also known as meibomian cyst, is an idiopathic, chronic, non-suppurative inflammation of the meibomian gland. Due to the accumulation of lipid substances in the Zeis gland and meibomian gland, it squeezes adjacent tissues and causes chronic granulomatous inflammation. There is normally a fibrous tissue cyst, which is generally not red or painful.