Mix 1 tsp salt in a quart of warm water. The warm water helps the salt dissolve. Put this solution in a clean jar. Make a new solution every 3 days. Sometimes, even though you do everything you should, you still get mouth sores.
Some chemo drugs are especially hard on the mouth.
If you develop mouth sores that are painful enough to keep you from eating and drinking, you may have to take pain medication so that you can eat and drink. Keeping your mouth moist will help make it more comfortable and help healing. Drinking fluids frequently and rinsing your mouth every 2 hours or so will help. Continue to do oral cares frequently. Be sure to use a soft bristled toothbrush because the gums are tender and may bleed easily.