What is this?

Can anyone tell me what these bumps are? The plant is still in the veg stage and has these bumps at all nodes on the main stem. They appeared about 10 days ago, plant appeared fine otherwise until last night...now the leaves look all sparse and spindly, not full and flat like my other plants on the same watering, nute schedule. Any idea?

First time I'm seeing them... try googling it if possible

the bluges at the nodes? that is a good sign my friend!! that means it is making strong stems for big buds!! I select plants to breed with for outdoor when I see bumps like those on seedlings. some of the weak stem strains do not grow those and the branches will rip off really easy once in bud

after they start growing really fast, they may need more fert.

I agree with saliva indica pits. Looks healthy to me man. All the mature plants we're growing look that. And the leaf thing is part of maturing too. At least on what we're growing. I don't know if there are technical term for it, but after a while the leaves start really getting that marijuana leaf look. They go from the flat broad look to a thin ridged look.

thanks for the input...this plant does have a lot stronger stems and branches than the rest so I will go with that!