It appears to be suffering from some thing. But we need more information. What kind of material are you growing it in? Is it indoors or outdoors? Have you checked for pests? How often are you watering it? Is it winter where you are? How much light is it getting? Are you fertilizing it? Is it near other plants that might have pests? How long has it been in the same pot?

Offhand, I see in the first photo an old leaf about to be discarded---that is normal. In the other photos, if you are talking about the spots that look like they have been punctured, I suggest you examine the plant carefully, with a magnifying glass if possible, to look for pests. If you are worried, spray it right now with a solution of one part water and one part alcohol, just to kill off everything that might be lurking.