Last three years from my father take medicine for heart ( triolmezest , tonact asp, v total etc). He will ok. From Last seven months he is suffering from burning and tingling sensation in both leg and hands and some times piles problem. He visit CMC velur. Dr suggest some report. All reports are ok. Dr reffers hematology department and suggest Bone marrow test. It can be pre existing symptoms of blood cancer? Pls suggest. Now what should I do.