canker sores

Every time I have my period, canker sores always appear. i hate it every time this thing is present.
to enlighten me on the matter, i have researched on the net on what it is and why it keeps on bothering me.
and here's what i have found:

Canker sores or also known as Aphthous stomatitis. It is a common cause of benign and non-contagious mouth ulcers. This condition is characterized by the repeated formation of ulcers on the mucous membrane of the oral cavity (the lining of the mouth), in otherwise healthy individuals. Symptoms range from a minor nuisance to interfering with eating and drinking.

Whenever I have this, I can't eat well, or even enjoy my favorite drinks.  Too much discomfort in sleeping, talking, eating and drinking. I don't know why this keeps on recurring. I am very much fund of taking multivitamins. Yet this thing still appears. Oh well, they say sometimes this canker sore is hereditary.
Can't do anything about it... might as well live with it! and just be patient on waiting when it finally disappears.
When you happen to have this, stay away from foods or beverages that has citric acids for it will worsen your sore. Stay away also from hot foods or drinks. take a lot of vitamin B.
credits to wikipedia