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.
This is an example of eustress. So we see that eustress isn't simply a better type of stress, but rather a better reaction and perception of what causes us stress and what we perceive we are capable of doing about it. Even the most positive thing in the world can cause some people bad stress.