My husband and I truly believe that one of his sisters is suffering from health anxiety or health phobia because almost every day she always think that she is sick or suffering from different kind of illnesses. She always go to the doctor because she is afraid that she will have cancer, diabetes and other types of serious illness.
Even if the doctor assured her that her health looks perfect but still she can't take out any negative thoughts that she have. She often self diagnose herself and will insist that she is actually sick. But I love my sister-in-law dearly and we will make sure that she knows it every day. Hopefully, in the future she will be able to overcome this type of disorder and just enjoy her life to the fullest.