Dear... my fiirst suggestion is that whenever u drink tea pls sprinkle a pinch of black pepper on ur tea . At morning empty stomach u put a glass full of water for boiling and add some 3 gm of crushed ginger in it...let it boil untill the half of the quantity of water is left . Now add 2 full spoon of honey in a glass n mix it with the filtered decoction of ginger.....n hv it. Repeatthe same at nit before u sleep....To improve ur voice u hv to gargle with saline water 3-4 times a day.....avoid curd n heavy meal at nit..... be careful about ur bowl movements.. Good luck