Hello Sir/Ma'am, I have been facing severe pain due to the mouth ulcer which I am getting almost every month. Usually it goes off in 4 days maximum. But this time , its been around a week, I am constantly taking Vitamin B complex and washing my mouth with Listerine mouth wash, having vitamin C foods like oranges and kiwis,but still its not all curing. I am having sore pain and unable to.concentrate on anything because of this pain. Kindly help me to get rid of it as fast as possible. Thanks in advance. Regards.