What is this on top of bud please

What is this

Awful pictures. Please get better ones if you want help.

Looks like bud to me but the pictures are terrible

Pictures very hard cod where it is

If you're in hydro I'd say you got a pH problem assuming you're using your Nutes right, there should be plenty in there so the leafs shouldn't look like that. Usually pH. The growing tip being white could be the same, or it could be how this plant is with lower buds. Unless you see it progress to buds outside I wouldn't worry about it and just focus on pH or your E.C.