There are a number of potential causes of Hornerâs syndrome, each affecting a different place in the sympathetic chain: 1  First order neuron lesion: brainstem stroke. 2  Second order neuron lesion: apical lung tumor, neck trauma, other. 3  Third order neuron lesion: orbital trauma or inflammation, carotid dissection, other.
In very severe cases where the patella keeps dislocating, the attachment of the patellar tendon may also have to be moved. Once the surgery heals, the patella will track up and down in the patellar groove, reducing pressure on the articular cartilage. 1  Knee Pain: Symptoms, Causes, and Treatments.
You may also experience knee pain after squats if you are doing it in the wrong way. 1  Applying too much weight on your toes tends to pull your body forward, causing pain. 2  An inability to distribute your body weight properly can lead to further mistakes.  Avoid moving your hips and knees forward while squatting.