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.
1 This condition, called ocular rosacea, can also cause styes as well as redness and swelling of the eyelids. Severe cases, if left untreated, can result in corneal damage and vision loss.  Burning or stinging. Burning or stinging sensations may occur on the face, and itchiness or a feeling of tightness may also develop.