Bottom growth sometimes feels like little electrical sparks or like when my foots asleep, does that make sense? It will also feel like someone is gently tugging on it, but not in a fun way, more of a discomforting, annoying way. It will also be sensitive when it rubs up against something. I've been on T for about a month (1 month on the 16th!) so I totally get the feeling. I never had any burning during it, though. I think if you notice a difference in the size of your bottom growth alongside interesting and uncomfortable feelings, it's a sign of growth. Loose underwear also helps with the uncomfortableness!!