Hi, I have a strange lump on the back of my throat, it is very small it also comes and goes, no pain and it is white. It is a little hard but sometimes randomly goes soft. It went away for about 3 or 4 days and now it is back. No idea what this could be. I m 25 and a non-smoker, I drink on weekends about 1-2 standard drinks, I m 6ft2 and weigh 85kg. Generally healthy. Many thanks