Ulcers most commonly occur on the inside of the mouth but may also occur on the tongue and lips, or in association with more generalized conditions, such as cancer. Allergic reactions to food and other substances may cause inflammation, swelling, and development of mouth white patches.
Part 3 Relighting the Pilot Light. 1. Turn the gas valve to the Pilot setting and push down on it. Doing this starts the flow of gas into the tube that supplies the pilot light. If your water heaterâs gas valve does not push down, look for a red control button near the valve. Hold this button down.
Tips & Warnings. 1  If the pilot doesn't light or doesn't stay lighted, you may have to clean the pilot tube. 2  If you smell gas before you turn the control valve to pilot or after the pilot has been lit for several minutes, turn off the main gas valve and call a qualified repair person.pen the door of the heater to expose the burner. For some heaters, you may have to completely remove the cover to have access to the burner. Locate tube that supplies the pilot light. This is a 1/4 inch metal tube that originates near the main valve and extends upward.