About a few months ago, my right ear was blocked suddenly and my feeling was exactly the same as what happens when someone goes to a higher altitude like mountains and the ear suddenly becomes heavy and difficult to hear properly.Then I consulted to an ENT specialist and at that time he told me that due to cold it was happened.And within a few days of his prescribed medicine, I was completely cured.But suddenly for a week now,I am having the same problem again.Kindly help me out from this problem I don't know why this is happening to me again.