Many factors: There are different type of sores/ ulcers and many factors can cause mouth sore. Common cause will include but not limit to trauma, stress, viral infection, fungal infection, medications and hormone level change like period or manopause.
Answered 12/9/2015
5.6k views
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
5 doctors weighed in across 2 answers
5 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question