Yes, it can help with mouth ulcers. Mouth ulcers are small, painful lesions that form in the mouth or at the base of the gums. Mouth ulcers can be caused by a vitamin (Vitamin B12) or mineral (iron) deficiency. As a result, using Neurobion forte can aid in the healing of ulcers. Along with taking this medication, you should make some dietary changes, such as avoiding spicy and acidic foods until the ulcer heals.