###Human: Kindly tell me whether the symptom-less spot on one side of tongue is normal or not. ###Assistant: Hi. Yes, it is not even traumatic ulcer. It is simply hyperkeratinized epithelium. That means it is normal tissue which is bearing some sort of stress. I think your upper tooth has a rough surface that may be the issue causing this or even it may be because of food if you are chewing only from that side. You need to take foods with much Vitamin A and B complex, fruits and carrot. Even you can take supplements like that of Vitamin A. No it is not something that can be the cause of concern. It is not a cancerous or ulcerous lesion. So, do not be too apprehensive. It is a normal tissue with little keratinization.