Chewing tobacco has real risks, just like tobacco smoking. Issues related to the oral cavity are a special concern here, since the tobacco sticks around in your mouth much longer. People who chew tobacco are at a higher risk of things such as:
- Receding gums
- Tooth decay
- Bad breath
- Oral cancer (chewing tobacco lowers your risk of lung cancer but increases your risk of oral cancer)
If it was your first time chewing tobacco, I assume you don't have oral cancer. But sores that don't heal are one of the first signs. Basically, avoid chewing tobacco in future!