My kitchen sink was dripping faucet I turne off valves for both hot and cold and realized it was hot. I trie to remove left hot handle to check rings but it woundn't come off. So I shut off hot valve from underneath and that fixed the drip. But now its dripping underneath on hot side with cold water on and turn hot back on its worse

What's the brand name of your faucet? Let's see if I have this correct. You have a two handled faucet that leaked hot water from the spout. You shut the hot side off at the angle stop but now the hot sides leaking at the supply connection. Correct so far? For the leak underneath simply tighten the connection foe the spout leak I'll need more details, Back to you, Tom