It started with one plant and now seems to be spreading to the rest of them.
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The bumps are normal as far as I know.
This is either early blight or wind burn killing the leaves.
It hasn’t been windy here at all. I’ll look into early blight.
The bumps on the stem are likely root initials. They are the earliest stage of development of a tomato’s roots. Most of the time, bumps are not harmful to tomato plants and are considered normal. Root initials emerge on a tomato stem as a result of stress – most often when there’s a limit or blockage in the stem.