According to the World Health Organization, EHS is described by vague symptoms that are different in each person. The symptoms are real and can be weak or strong and can make some disabled. There is no specific list of features to diagnose someone, and there is no scientific link between electromagnetic fields and how people feel. EHS is not a medical diagnosis. People who claim to have EHS blame it for headaches, fatigue, stress, sleep disturbances, skin symptoms like prickling, burning sensations and rashes, pain and ache in muscles and many other health problems. Although electromagnetic fields can make the body hot, people who say they have EHS say they feel sick at very low levels.