”Blepharitis is an acute, painful, purulent, nodular inflammatory lesion of the eyelid glands, and these infections are often very red and painful. Most blepharitis has a staphylococcal infection causing it, with infections caused by Staphylococcus aureus being the most common. The wheals caused by blepharitis tend to be external wheals and drain outward through the skin of the eyelid, whereas the wheals associated with blepharitis tend to drain inward through the conjunctiva and are called internal wheals. Internal mydriasis often causes localized congestion and conjunctival edema on the conjunctival surface of the affected eyelid. For the treatment of mydriasis, the affected eye is treated by doing a hot compress with the eyes closed, with the heat controlled to a degree that the patient can tolerate, without burning the skin around the eye, four times a day for 15-20 minutes each time. The hot compresses should be applied until the lesion is no longer red or painful. The lesion that begins to “puss out” should be excised locally to allow all the pus in the lesion to drain out. Do not squeeze the abscess when it is not yet formed, as squeezing may cause bacteria to enter the blood vessels and cause cavernous sinus thrombosis or sepsis, which can be life-threatening. For blepharitis, do a daily eyelash root scrub, and for blepharitis, focus on scrubbing the opening of the lid gland, as this will prevent new mydriasis from forming. If hot compresses, eyelid scrubbing, and drainage of the lesion with pus do not control the chalazion well, the infection process will progress in its natural course and the combined debris will become a painless cystic lesion called a “chalazion. Chalazia usually requires surgical removal, but smaller lesions can also be treated with intra-lesional steroid injections.