Your tongue might seem small and innocuous, but it plays a substantial role in your everyday life. In addition to speech and taste, it's often a primary indicator of your overall health. Your tongue is also remarkably uncomfortable when indisposed, and sores or tongue blisters can inconvenience you more than you might expect.
These oral blisters are one of the most common oral problems, and most people experience them at some point in their life. They're usually small - less than a third of an inch wide - and form on the inside surface of your cheeks, under the tongue or on your gums – if not on the tongue itself. According to the NHS, the sores usually appear inside the mouth, on the cheeks, lips, or tongue, and can change in size.
Mouth sores usually carry a general sense of discomfort. And although the pain usually goes away on its own in seven to 10 days, it can take three or more weeks for the ulcers themselves to heal. Mouth ulcers can be caused by emotional stress, hormonal shifts, a lower immune system, and Coeliac disease. If your mouth sores become infected, however, additional problems such as swollen lymph nodes can arise, so it's best to address mouth sores as early as possible to prevent an infection from worsening. See your doctor if you develop any of the following at the same time:
- Joint pain
Maintain good oral hygiene through daily brushing and flossing, and rinse your mouth with an antibacterial mouthwash.
Also known as thrush, candidiasis is an overgrowth of the Candida fungus, which grows naturally in your mouth. It develops whenever the bacteria protecting your oral tissues are compromised, either through the use of antibiotics, medication-induced dry mouth or ill-fitting dental appliances. Symptoms of oral thrush can include any of the following:
- A bad or reduced sense of taste
- White, cheesy-looking patches of fungus
- Tongue blisters or red, inflamed patches of tissue, often hidden by fungi
- Cracked, red areas of skin at the corners of your mouth
Candidiasis usually clears up within seven days with consistent treatment, according to the NHS. If it extends beyond this time or recurs frequently, however, your doctor may recommend testing for conditions such as diabetes, HIV or cancer.
Physicians commonly prescribe antifungal treatments for candidiasis, either in the form of lozenges or mouthrinses for mild cases, or a course of tablets for more severe conditions. Over time, patients have been known to develop immunity against these treatments, so doctors are careful about recommending them for every case of the fungus. Nevertheless, maintain good daily oral hygiene, avoid the use of antibiotics unless absolutely necessary, and make sure your mouth remains well hydrated. Many prescription products contain minor doses of sodium fluoride to help reduce your risk of these dry mouth-related conditions.
Injuries to your tongue can also result in sores resembling tongue blisters. For example, eating crunchy foods such as crisps, sucking hard sweets, biting your tongue or sipping an excessively hot beverage can all cause the tongue to develop blisters, cuts, and burns. These may result in painful ulcers that take time to go away, but unless infection develops, they usually aren't a cause for concern.
If your tongue is sensitive and prone to injury, avoid foods that generally cause damage. Practice daily oral hygiene and use warm salt water or a mouthrinse to promote healing and protect the natural bacteria balance in your mouth.