Hi. Read and understood your history of anemia, which has recovered well, but the sound in the ear and the tingling in feet, hands and tongue has remained as it was. The probable reasons would be some sensory Nervous system problems. This may even occur in case of hypocalcemia due to various reason like tumor or removal of the parathyroid hormones and so on. You need to consult a Family Physician for clinical evaluation, investigations of the blood and come to a diagnosis and give you supplements of multivitamins with trace elements, calcium, phosphorus, Vitamin G in therapeutic dosages. You will be fine.