What causes weight loss (9lbs 2 months) headache body-ache and pain (back, arms and legs) ? cancer? brain cancer? stress, anxiety? thank you in advance?

Evaluation needed: Your symptoms are nonspecific and require a thorough history and system review, complete physical examination and appropriate testing in order to make a differential diagnosis and prescribe proper treatment or make a referral to a specialist. Possibilities include diabetes, overactive thyroid, autoimmune arthritis or malignancy. If it turns out to be anxiety, stress management therapy should help.

Agree with Dr. C: Any unintended weight loss needs to be evaluated by a doctor. Wish you good health!