plz help

hey guys can any one explain why my plant stem is turning redish. and if i should cut the burnt leaf off?

no just leave if is it the lower leaf with the spot on it if so leave it and the stem looks fine

Never ever remove leaves. If the problem isn't fixed and you remove them, healthy leaves will have to deal with theproblem further.

I'm not completly sure, but the 3rd pic might indicate that you have a caterpillar problem. Check if any pests keep nibbling on your plant.