Agreed need more info. As a guess. A lot of clawing in the first pic maybe nitrogen toxicity. Maybe a little heat stress in the second pic? Just guessing.
I agree that the 1st picture looks like a classic example of N toxicity. If you can answer these questions then people should be able to help you narrow it down.
What medium are you growing in?
What is the size of your tent or growing area?
What are you running for lights (brand and model help), and how close to the plants are they?
How often are you watering, how much, and at what pH?
What are you feeding, at what dosage, and how often?
What is the temperature and humidity in your growing area?