I have very low water pressure in my hot water faucett in my kitchen sink. A dishwasher is connected there too. The hot water in all the other faucetts in the house are just fine. How do I fix this?

Hi Patti and welcome, have you tried cleaning the aerator at the end of the faucet?

If theaerator screens are clean and you still get low-pressure from the open spelled then it sounds like dirt in the cartridge inlets. If that is so then try this.
Shut the water off under the cabinet ands open up the faucet. Remove the cartridge and check and clean the inlet ports. While the valve's open place a pan over it and turn the hot water on to flush out the supply. You should have a full sream when you do this. If not let me know. Good luck, Tom