Herpes and syphilis are STDs that can cause sores on the mouth or genitals (or anywhere else).
No.
Herpes
Low white blood cells do not cause sores in the mouth. However it makes them much easier to get.
Syphilis can cause sores around the mouth.
Mouth sores are not a listed side effect of Ritalin. However, taking a stimulant medication such as Ritalin can cause dry mucus membranes in the mouth. In certain people, dry mouth may lead to sores. Biotene is a mouthwash which helps with dry mouth.
I am currently on Minocyclin 100mg for my facial acne. Have had no mouth sores, but have had White Tongue for a while. Still looking if there is a connection...
No, it cannot.
No, canker sores are abrasions inside your mouth and can be caused by biting your mouth, stress, drinking coffee etc. Cold sores (oral herpes) can be spread by someone else.
There is nothing detrimental about cold sores, they are not life threatening. All they do is cause annoying sores / blisters on the mouth.
Sores inside the mouth are called canker sores.
Mouth sores are caused by Chewing Tobacco.