But they often have symptoms of some autoimmune disease, like being tired all the time and pain. 1  CFS can cause you to be very tired, have trouble concentrating, feel weak, and have muscle pain. 2  Symptoms of CFS come and go. 3  The cause of CFS is not known.
Best Answer: A sty is a noncontagious infection of the eyelash follicle, it can be caused by effects of medication, hyperventilation, stress, anxiety, drinking alcohol,Styes are very common and are not a serious problem. Most will go away on their own. i really hope this helps.
A stye is caused by an inflammation and bacterial infection of the oil producing glands in the eyelid. Styes are sometimes itchy and tender to the touch. Styes usually appear as a reddish bump on the eyelid. When a stye first develops, the eye may feel bruised and may feel sensitive to light.