Pink eye, medically known as conjunctivitis, is an inflammation of the conjunctiva, which is the thin, clear tissue covering the white part of the eye and the inside of the eyelids. A persistent and widespread misconception suggests that pink eye can be contracted from passing gas; however, scientific evidence firmly debunks this myth.

It is definitively false that you can get pink eye from a fart. The bacteria or viruses responsible for causing conjunctivitis are not released into the air through flatulence in a manner that could cause infection. This myth likely originated from the fact that pink eye *can* spread when bacteria from fecal matter, specifically from stool particles on unwashed hands, are transferred to the eyes. For instance, an individual might develop pink eye if they do not wash their hands properly after using the bathroom and then touch their face or eyes. While bacteria from stool can indeed cause an eye infection if they enter the eye, passing gas does not push fecal matter or bacteria into the air in a way that spreads infection, and clothing acts as an effective barrier, keeping particles from traveling outwards.

Pink eye develops when the conjunctiva becomes irritated, inflamed, or infected by various factors. The most common causes include viral infections, such as those associated with the common cold, and bacterial infections, including Staphylococcus (staph) and Streptococcus (strep). Allergies, triggered by substances like pollen, dust, or pet dander, are another frequent cause. Chemical irritants, such as chlorine from swimming pools, smoke, or certain cleaning products, can also induce conjunctivitis. Furthermore, foreign objects in the eye, such as dirt, contact lenses, or eyelashes, and a blocked tear duct—more common in newborns where tears cannot drain normally—can lead to the condition. Less common infectious pathogens, including fungi, amoebas (small organisms that can cause harmful diseases), or parasites, can also be culprits.

Both bacterial and viral conjunctivitis are highly contagious and spread easily from person to person. The infection typically transfers when bacteria or viruses are carried from contaminated hands to the eyes, often a result of poor hand hygiene.

To significantly reduce the risk of contracting and spreading pink eye, several preventative measures are crucial. These include frequent handwashing with soap and water, especially before touching your face. It is also important to avoid touching or rubbing your eyes and to limit sharing personal items such as towels, washcloths, makeup, eye drops, pillows, contact lenses, or eyeglasses. Regularly washing pillowcases and sheets in hot water is also recommended. Individuals should avoid close contact with someone who has pink eye until their condition clears. Proper cleaning and storage of contact lenses are essential for lens wearers. Finally, managing allergies by taking recommended medications and limiting exposure to triggers, such as pollen, can help prevent allergy-induced conjunctivitis.