Those are the beginnings of new branches... on a side note it looks like you need a lot more light for that plant, it is stretching a lot which indicates it’s not getting enough light First to third grow. From beginner to novice lol.
You wont be able to tell until you flower. While vegging do 18 hours on for lights, with 6 hours off. Flowering 12 hours on, 12 hours off - with no light leakage
Like 5-7 hours a day. The first 2 weeks here in So Cal were really overcast I think that was it has the initial stretch from the first node up.
If you could move to a spot with longer direct light times the plant would thank you. If not it’ll still be fine. First to third grow. From beginner to novice lol.