Which is why I would remove it, if it's a healed stress wound then nothing is to be done. I'm know how rough I can be with widow I grow from experience with the strain I have. I also realize that just because we call them ladies that roughness is not excluded from the botany of the plant. I've had accidents where I've created alot more stress than a razor cut, and with extra time and care healed properly. Just my 2 cents, not trying to flame. (note: the op is not in flower)Rotting is my hypothesis because of the description of being soft and tender but now I'm leaning more towards fungi infection.