Thanks for writing your query to us.
upto 10lbs is a significant weight loss. Also abdominal pain
,loss of appetite, weight loss, weakness of 1 month duration needs to be evaluated.You have not mentioned your age & gender. Tuberculosis
, malignancy, gastrointestinal causes like inflammatory bowel disease
, certain medicines like biotin supplements can be cause for weight loss. Kindly get your routine blood test like CBC, ESR, Liver function test & sonography of abdomen.
Wish you good health.