Orange County Floor Kitchen Bath

this is remodel work and several outlets have been added and now they are overheating with use…even if only one outlet is being used. If more than one counter top appliance is being used it will trip a circuit breaker. The outlets are very hot to the touch..we have stopped using all of them until we come up with a solution to prevent a fire hazard……circuit testers show wiring ok (the yellow ones with the lights.