###Human: Does oral or genital herpes show symptoms like bloody blisters in mouth? ###Assistant: Hi. Your concern may be oral lichen planus which is an autoimmune issue which is treatable. Or this can be aphthous stomatitis which are oral ulcers and they are also treatable. They flare due to low immunity of any reason, low iron in the blood, B12 deficiency, stress, overthinking, etc. Thirdly, it can be oral herpes which will have multiple ulcers rather than your presentation. The lesion might not be any oral cancer by the pictures (attachment removed to protect patient identity). For more information consult a dermatologist online -->