u have describe in very good way.
as far as he is concern ,he looks to suffering from hypochondriasis
it refers to excessive preoccupation or worry about having a serious illness.
An individual suffering from hypochondriasis is known as a hypochondriac. Hypochondriacs become unduly alarmed about any physical symptoms they detect, no matter how minor the symptom may be.
They are convinced that they have or are about to have a serious illness.
Often, hypochondria persists even after a physician has evaluated a person and reassured them that their concerns about symptoms do not have an underlying medical basis or, if there is a medical illness, their concerns are far in excess of what is appropriate for the level of disease.
Many hypochondriacs focus on a particular symptom as the catalyst of their worrying, such as gastro-intestinal problems, palpitations, or muscle fatigue
from his history he has hypochondria.
better to consult psychiatric doctor
he need session with doctor to fatch out false belief.
i really congratulate u to give him such warm and heartly support.
he need to get treated