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.
Stye Causes: Clogged eyelid glands seem to be one cause of styes. If you suffer from chronic blepharitis or meibomian gland dysfunction, bacteria may often build up and infect the glands, making you prone to developing styes. Meibomian gland dysfunction can also cause poor tear film quality. Eye makeup sometimes causes styes, especially if you share makeup with others. Also, wearing too much eye makeup can sometimes cause a stye to develop. Some people notice the development of a stye during times of stress.