Omg please help with budgie?

My budgie or parakeet's cere's color is usually dark blueish and that usually means its a boy right?But now its turning brownish and that means its a female but im worried its scaly face. If you search on google "scaly face" it doesnt looke like those birds. My parakeets cere is brown but you can see bluewhiteish from the nostrils to the side. Its only in its cere and nowhere else on its face and its nose and the brown part looks a little puffed but not extremely ashy or scaly or rotting. Im scared it scaly face !!!!!!!! I would take a picture but its blurrybecause of the cage and i would take him/her :O out but im trying to tame him/her. Its over 4 years old and i really do not have money for a vet. Im not even sure if its sick