hi, i have a problem with my ear, i always have, as a child i had to have gromits when they were taken out i constantly suffered from earaches and infections.my ear has always had a yellowy/green substance which smells come from it a few months ago it stopped and then i found a lump in my neck to which i have been told by my gp to blow holding my nose and unblock it, but when i do this there is a very loud screeching noise, my ear then feels very full and itchy and i can then get a little of the fluid that is in there what could this be