Forums Ask for advice B12 deficiency Reply To: B12 deficiency March 20, 2018 at 1:58 pm #379 bella 11 Posts @janey Thanks just looked at symptoms, I am always ill (hence the first lot of bloodtests) in 1 month alone I had 2 water infections, ear infection colds and coldsores. I now have to take coldsore tablets daily otherwise I get a mouthful of them.