I'm a hairdresser, my shop is in an old building - is there some way I could add water pressure just for my sink - someone flushes and I'm down to a drip... didn't use to be this bad - thank u

Do you own or rent the shop? Just asking because landlords don't like you messing with their plumbing. If you own I would shut the main and remover the faucet valve or cartridge to see if its blocked. If this spigot has an aerartor try removing that too to see if its plugged.