help id

Hi all, I've posted before about my betta having this strange grey coating around his gills. I've seen these small flecks before , there were only one or two but today I noticed a lot more of them around his left gill, the patch on his left side and in his right nostril. They aren't white, more...

On the top of his tail, I notice a white area a few weeks ago which has gradually raised. You can see it just before his tail starts, above the black marking on his side. At first I thought maybe it was just part of his markings until it became more of a small lump.