In the bathroom sink has no hot water pressure and tub has normal hot water pressure.I clean faucet and bottom pipes and flush hot water tank.

Hello mrazi, when you say that you cleaned the bottom pipes do you mean that you flushed the water supply lines to the faucet? If yes then we assume that you do have good water pressure up to the shutoff valves under the sink. Then the problem is in the faucet, you can try to flushout the debre out of the hotside through the faucet by shutting off the hot water valve to the faucet under the sink, then disconnecting the hot supply line at the valve. Holding the supply line in the bucket turn on both hot and cold sides on the faucet allowing the cold side to bypass to the hot side flushing out any debre through the hot supplyline into the bucket. If you have a single handle faucet turn it on so the cold can flow through to the hot side. Hopefully this will clear out any debre that may be plugging up the hot side. Hook up the supply line after flushing and see what happens. Goodluck ----zeke----