Dark yellow bubble

[TimidK]

It's on one of the leaves on my seedling. I don't know what it is but it doesn't look right. Can someone tell me whats wrong? :(

I'll try to get a picture asap

[TimidK]

I hate to deouble post but something worst has happend. I carefully took off the yellow bubble with tweezers and left it to grow over-night and now I've noticed that there are hairs coming out of the leaf where the bubbles used to be. I'm not sure what it is, can somebody help me please.

[cigarettes42]

post some pictures and i bet you will get a faster answer.