If it is only a temporary emergency, you can try the following tricks:

Don't think about things that put you under great pressure.

Drink hot milk or warm water (some patients with stomach diseases can't drink milk, which will lead to flatulence)

Eating soda cookies, baking soda is alkaline, stomach pain in the middle of the night is likely to be hungry, acid reflux, baking soda can neutralize stomach acid.

After eating some ventilated snacks such as dried tangerine peel, burping or farting, the stomachache will be greatly relieved.

Warm your stomach with a warm water bag and take a hot bath if possible.

On the prone bed, put a pillow under your stomach.

None of the above methods are therapeutic measures, and they can only relieve temporary stomachache. This is an emergency measure, and then you should see a doctor as soon as possible.