How will chewing tobacco affect oral health?

Cancer and more. You are at increased risk for cancer of the mouth, throat, esophagus, urinary bladder, pancreas and perhaps others. Tobacco also causes blood vessel disease leading to heart attacks, stroke, gangrene and shortens life by about ten years.
Damaging. Tobacco will decrease blood flow which in turn causes immune suppression which means bacteria of the mouth can cause more damage to gums and bone progressing gingivitis toward periodontitis, leading toward infections, bone loss, and tooth loss. It can also decrease. The other obvious is the constant irritation and chemicals can lead to oral cancer which may lead to major surgery or death. Bad!