My name is Ben, 2days ago I dyed my beard a black colour because my beard was going grey, I did a patch test and everything was normal, and testa day my beard my cheeks swelled up like a ballon I am now taking Meds from the hospital since last night, but the hairs on my cheeks from my beard are really thin!, would my facial hair grow back or wouldn't it grown back anymore?, or is there any advice you could give me please. Thanks