Undoubtedly one of the most common running ailments, runner's knee or patellofemoral pain syndrome (PFPS), can hamper your training or leave you completely sidelined. The pain associated with runner's knee is located under, slightly above or below the kneecap. It generally worsens when athletes run uphill, downhill or up and down stairs. A popping sensation is sometimes audible. In the worst cases, the knee may swell. More: How to Prevent Knee Pain and Injury. A term used to describe a number of knee issues, runner's knee often occurs because of an increase in mileage. While some harriers will experience sporadic pain, others have problems nearly every time they add miles. The condition can also be related to poor running form and core strength.
Keratitis is a condition in which the eye's cornea, the clear dome on the front surface of the eye, becomes inflamed. The condition is often marked by moderate to intense pain and usually involves any of the following symptoms: pain, impaired eyesight, photophobia, red eye and a 'gritty' sensation.
(August 2016) Corneal ulcer, or ulcerative keratitis, is an inflammatory or more seriously, infective condition of the cornea involving disruption of its epithelial layer with involvement of the corneal stroma. It is a common condition in humans particularly in the tropics and the agrarian societies.