I have a kanker sore in my mouth, on my gums, how do I get this to go away? Special mouthwashes?

Homemade rinse. I noticed a lot of questions about sores in the mouth today. Most of them are caused by viruses and will go away by themselves. Nothing will make them leave faster. But mixing Benadryl (diphenhydramine) with maalox (one to one mix) and swish around the mouth may give you relief from the burn and pain of the sores. Also avoid sour foods. You need to keep hydrated, cold drinks and popsicles also help.
Laser treatment. Laser treatment by your dentist will heal the lesions quickly and take away the pain instantly.