Take a pic of the whole plant and problem areas. Underside of leaves for pest s too. Force your flash or natural light. Include pot size and soil.
The list pH, nutes, soil, temp, plant type, RH, etc. We will try to help you to the best of our knowledge. HPS and LED pics make color judgement almost immpossible.
Roll on brothers and sisters..
Have a great one. Advice is for folks with a legal grow and worth what you paid for it.