Herpes Simplex Stomatitis
A painful herpes virus infection inside the mouth
Quick Facts
- Type: Viral mouth infection
- Cause: Herpes simplex virus
- Most common in: Young children
- Main symptom: Painful mouth blisters and ulcers
Overview
Herpes simplex stomatitis is a mouth infection caused by the herpes simplex virus, most often type 1. It produces painful blisters and sores inside the mouth, on the gums, tongue, lips, and the lining of the cheeks. When it occurs as a person's first exposure to the virus, especially in young children, it is often called primary herpetic gingivostomatitis and can be more widespread and uncomfortable than later flare-ups.
The infection is very common and usually clears on its own within one to two weeks. After the first infection, the virus stays in the body in a dormant state and can reactivate later, typically as smaller cold sores on or around the lips. While herpetic stomatitis is rarely dangerous in healthy people, it can make eating and drinking painful, and ensuring enough fluids is an important part of care, particularly in children.
Symptoms
Symptoms often begin with general illness before the mouth sores appear, especially in a first infection.
- Fever and feeling generally unwell, often before sores appear
- Painful clusters of small blisters that break into shallow ulcers on the gums, tongue, lips, and inside the cheeks
- Red, swollen, and bleeding gums
- Pain that makes eating, drinking, and swallowing difficult
- Irritability and drooling in young children
- Swollen, tender lymph nodes in the neck
Symptoms usually peak over a few days and resolve within one to two weeks.
Causes
The infection is caused by the herpes simplex virus, usually type 1. It spreads through direct contact with the virus, such as kissing, sharing utensils or cups, or contact with the saliva or sores of an infected person. The virus can spread even when no visible sores are present.
A first infection often occurs in early childhood. After that, the virus remains dormant in nerve tissue and can reactivate later in life, triggered by factors such as illness, fever, sunlight, stress, or a weakened immune system, usually producing milder cold sores.
Risk Factors
- Young age, as first infections are common in early childhood
- Close contact with someone who has an active cold sore or oral herpes
- Sharing cups, utensils, or lip products
- A weakened immune system, which can cause more severe or prolonged infection
- Triggers such as fever, stress, or sun exposure that reactivate the virus
Diagnosis
Doctors can usually diagnose herpetic stomatitis from the appearance of the mouth and the history of symptoms.
- Clinical examination: The pattern of widespread blisters and ulcers with swollen, bleeding gums is often enough to make the diagnosis.
- Laboratory tests: In unclear or severe cases, a swab of a sore can confirm the herpes simplex virus.
- Ruling out other causes: The doctor may distinguish it from canker sores, hand-foot-and-mouth disease, or other mouth conditions.
Treatment
Most cases improve on their own, so treatment focuses on relieving pain and maintaining hydration.
- Fluids: Encouraging frequent sips of cool water or other fluids to prevent dehydration, which is the main concern in children.
- Pain relief: Over-the-counter pain relievers such as acetaminophen or ibuprofen as appropriate.
- Soothing measures: Cool, bland, soft foods; avoiding spicy, salty, or acidic foods that sting.
- Antiviral medication: Prescription antivirals may help if started early or for severe infections or people with weakened immunity.
- Good hand and mouth hygiene: To reduce spread and prevent infection of the eyes or other areas.
Prevention
The virus is very common, so preventing spread is the main goal.
- Avoid kissing or close contact when you or someone else has an active cold sore
- Do not share cups, utensils, toothbrushes, or lip products
- Wash hands often, especially after touching the mouth or sores
- Keep children with active mouth sores from sharing toys that go in the mouth
- Protect the lips from excessive sun, a common reactivation trigger
When to See a Doctor
See a doctor if mouth sores are severe, last more than two weeks, or keep a child from drinking enough fluids. Seek prompt care for:
- Signs of dehydration, such as very little urine, dry mouth, no tears, or unusual sleepiness
- High fever or worsening illness
- Sores spreading to the eyes, or eye pain and redness
- A weakened immune system with widespread or persistent sores
Frequently Asked Questions
What causes herpetic stomatitis?
It is caused by the herpes simplex virus, usually type 1, which spreads through contact with saliva or sores, such as kissing or sharing cups and utensils. A first infection often happens in early childhood and causes widespread, painful mouth sores.
Is herpetic stomatitis the same as canker sores?
No. Canker sores (aphthous ulcers) are not caused by a virus and are not contagious, and they usually appear on soft tissue rather than the gums. Herpetic stomatitis is caused by the herpes virus and often involves fever and swollen, bleeding gums.
How long does herpetic stomatitis last?
In healthy people, it usually clears on its own within one to two weeks. Care focuses on pain relief and keeping up with fluids, and antiviral medicine may help if started early or in severe cases.
Is herpetic stomatitis contagious?
Yes. The herpes simplex virus spreads through direct contact with saliva or sores, and it can spread even without visible sores. Avoid kissing and sharing cups or utensils while sores are present, and wash hands often.
When should I worry about herpetic stomatitis in a child?
Seek care if a child cannot drink enough fluids and shows signs of dehydration such as very little urine, dry mouth, or unusual sleepiness, or if there is high fever, spreading sores, or eye involvement. These need prompt medical attention.
References
- MedlinePlus, U.S. National Library of Medicine. Herpetic stomatitis.
- Mayo Clinic. Cold sore.
- American Academy of Pediatrics. Herpes simplex.
- Centers for Disease Control and Prevention (CDC). Genital herpes (HSV) - oral herpes information.