There are many subtypes of conjunctivitis, and the time to healing varies from one subtype to another. The most common is ocular infectious conjunctivitis, which usually has a short onset, prominent symptoms, red eyes with increased yellowish-white discharge, and often causes upper and lower eyelid adhesions in the morning, and can be cured in 5-7 days with topical antibiotic eye drops. Viral conjunctivitis, commonly referred to as pink eye, usually has obvious photophobia and tearing, but no yellow discharge, usually 3-4 days of peak incidence, in the case of antiviral eye drops 10-14 days can be basically cured. There is also allergic conjunctivitis, which occurs every year with the change of seasons and can also occur at any time due to the stimulation of the environment in which it is located or the stimulation of the objects to which it is exposed, mostly related to the individual’s constitution, with a duration of illness ranging from a few days to several months. There are also immune-related conjunctivitis, such as vesicular conjunctivitis, which can recur when the body’s resistance decreases and requires the use of hormonal eye drops for about 10 days per attack. Conjunctivitis caused by local mechanical irritation, such as trachoma conjunctival stones, inverted eyelashes, foreign bodies in the eyelids or eyelid masses, requires timely removal of these irritants to talk about healing, and the duration of treatment is variable. In conclusion, depending on the cause or type, various types of conjunctivitis present with different characteristics and require prompt medical attention and guidance from a medical professional.