Tongue sores can have several causes, some of which may be harmless, while others may be more serious. The most common causes of sores at the tip of the tongue include:

    Injury: Biting or scalding your tongue can cause a sore to develop.
    Allergies: Eating something you are allergic to can cause an irritated patch on your tongue.
    Ulcers: Round or oval sores in the mouth, including the underside of the tongue, can be caused by factors such as stress, certain foods, or mouth damage.
    Infection: Bacteria, fungi, or viruses can cause tongue sores, such as oral thrush, a fungal infection.
    Geographic tongue: This condition causes red patches and soreness on the tongue due to missing bumps.
    Neuralgia: Pain in the tongue due to nerve damage or disturbance can occur throughout the tongue or at a specific point.
    Oral cancer: A sore on the tongue can be a symptom of oral cancer, which is the growth of abnormal cells in the mouth.
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