Can stomach cancer cause dry mouth.

Not directly: Only indirectly if you have severe generalized symptoms of other sorts (weight loss for example) .Anxiety worrying about stomach cancer is much more likely.

No: A dry mouth is related to inadequate production of saliva, not stomach cancer.

Indirectly: It's more than likely a side effect of the medications or chemo. Hope this helps.

Medication: It is possible that a medication taken to treat stomach cancer could cause a dry mouth.