Canker sores are small ulcers that normally come into view in the mouth and turn into very painful for the person to eat or drink everything. Canker sores are secret into 2 categories, namely: easy and complex canker sores. Giving you a small input as to what easy canker sores are; essentially these sores become visible in the mouth about 3 to 4 times a year and those who are additional prone to these ulcers are the ones who are among 10 and 20 years of age. Multifaceted canker sores influence people who have had them in the earlier period. Have a look at this below.