Herpetic Whitlow

Overview

Herpetic whitlow is an infection of the fingertip caused by the herpes simplex virus (HSV). The same virus can cause cold sores or genital sores. In herpetic whitlow, small, painful blisters form around the fingertip or nail. It is not a bacterial infection, so antibiotics do not treat it unless a bacterial infection also develops.

Herpetic whitlow is not common overall, but it is seen more often in children who suck their thumbs and in healthcare workers who work with mouths or body fluids. Anyone can get it.

It can affect people of any age. It is most often seen in children who suck their thumbs or fingers, healthcare workers, people who bite their nails or cuticles, people with cracked or dry skin on the hands, people with eczema, close-contact athletes, and people with a weakened immune system.

Symptoms

Common symptoms

• Tingling, itching, or burning on the fingertip before blisters appear
• Redness and swelling of the fingertip or skin around the nail
• Small clusters of fluid-filled blisters that may join together
• Sharp or throbbing pain, sometimes severe
• Tenderness when touching or using the hand
• The nail may look lifted or the skin around it may look tight
• Fever or feeling unwell during a first episode
• Swollen lymph nodes in the armpit or elbow area

Symptoms in children

• Fussiness or crying when the hand is touched
• Refusing to use the affected hand or refusing to suck the thumb
• Blisters around the thumb or fingers, especially in thumb-sucking children
• Fever, poor feeding, or irritability during a first episode
• Sometimes a parent notices the child touching a cold sore and then developing finger sores

Symptoms in older adults

• Symptoms are usually similar to those in younger adults
• Pain may feel more intense, and healing may be slower
• People with diabetes, poor circulation, or a weakened immune system may have more severe symptoms
• Older adults should get medical advice early if the finger is very swollen, very painful, or if fever develops

Causes

Main causes

• Herpes simplex virus type 1 (HSV-1), the virus that often causes cold sores
• Herpes simplex virus type 2 (HSV-2), the virus that often causes genital herpes
• Direct skin-to-skin contact with an active herpes sore or with infected saliva or fluid from a blister
• Spread from a cold sore or genital sore on your own body to a break in the skin on your finger
• Contact with infected fluid in healthcare settings, especially without gloves

Risk factors

• Thumb sucking or finger sucking in children
• Nail biting, cuticle biting, or picking at the skin around the nails
• Dry, cracked, or damaged skin on the hands
• Working in healthcare, especially with mouths, breathing tubes, or body fluids
• Close-contact sports where skin-to-skin contact is common
• Eczema or other skin conditions that break the skin barrier
• A weakened immune system

When to see a doctor

See a doctor urgently if:

• This is your first outbreak of finger blisters
• The finger is very painful, very swollen, or you cannot move it
• You see pus, red streaks, or redness spreading up the hand or arm
• You have a fever or feel very unwell
• You have diabetes, a weakened immune system, or poor circulation
• The sore came after contact with a cold sore, genital sore, or a healthcare exposure
• A newborn or pregnant woman has been exposed to a herpes sore

Book a routine appointment if:

• The blisters are not healing after 2 to 3 weeks
• You have repeated outbreaks in the same finger
• You are not sure whether the finger infection is herpes or a bacterial infection
• You want advice about how to prevent spread to family members or coworkers
• You have questions about antiviral treatment or pain relief

Diagnosis

A clinician often diagnoses herpetic whitlow by asking about symptoms and looking at the finger. The blisters can look similar to a bacterial finger infection, so a swab may be taken to check for herpes simplex virus. This is especially useful for a first episode, severe symptoms, or when the diagnosis is unclear.

Tests that may be done

• A swab from a blister to test for herpes simplex virus using PCR (a test that looks for the virus's genetic material)
• Viral culture (a test that tries to grow the virus from a swab)
• A bacterial swab or culture if there is pus or concern about a bacterial infection
• Blood tests are not usually needed unless the clinician is concerned about other conditions

What to expect at your appointment

The swab may feel like a light scratch. Results can take a few days. A clinician may start treatment based on your symptoms before results are ready. If the diagnosis is uncertain, they may ask you to come back for a review.

Treatment

Herpetic whitlow usually heals on its own in about 2 to 3 weeks. Treatment aims to ease pain, prevent spread, and reduce the chance of complications. Antiviral medicine may be prescribed, especially if it can be started early in a first episode or if symptoms are severe or recurring.

Self-care at home

• Keep the finger clean and dry.
• Cover the blisters loosely with a clean dressing to reduce touching and spread.
• Do not squeeze, pop, or cut the blisters.
• Wash your hands often with soap and water, especially after touching the finger.
• Avoid touching your eyes, mouth, or genitals after touching the sore.
• Use a separate towel and avoid sharing towels, utensils, or sports equipment while sores are present.
• A cool compress may ease pain and swelling.
• Ask a pharmacist about simple pain relief that is suitable for you.
• Avoid contact lenses and contact lens handling if you have touched the sore, unless you have washed your hands thoroughly and a clinician has advised it is safe.

Medical treatments

A clinician may prescribe antiviral medicine for herpetic whitlow. This is most helpful when started early, and it may be recommended for severe first episodes, recurrent episodes, or people with a weakened immune system. Antibiotics do not treat herpes viruses, so they are only used if a bacterial infection is also suspected. A clinician may also advise on pain relief and wound care. Do not use leftover medicines or creams from another person.

When is surgery considered?

Surgery is not usually needed for herpetic whitlow. A clinician may drain a bacterial abscess if one forms, but herpetic blisters should not be squeezed, cut, or drained at home.

Living with this condition

While you have blisters, keep the finger covered and wash your hands often. Try not to touch the sore and then touch other parts of your body. You can usually continue normal daily activities, but avoid close skin contact with others, shared towels, and shared sports equipment until the sores have crusted or healed. Ask your clinician when it is safe to return to work or contact sports.

Lifestyle tips

• Keep your hands moisturized to prevent cracked skin, but avoid putting moisturizer directly on open blisters unless advised.
• Avoid nail biting, cuticle picking, and thumb sucking to reduce skin breaks.
• Get enough sleep and eat regular meals to support healing.
• Manage stress where possible, as stress can sometimes trigger herpes outbreaks.
• Use gloves if your job involves contact with body fluids or mouths.
• Do not share towels, lip balm, utensils, or sports gear while sores are active.

Diet and exercise

There is no special diet for herpetic whitlow. A balanced diet and enough fluids support general health. Gentle exercise is usually fine if you feel well. Keep the sore covered and wash your hands before using gym equipment or contact sports gear, and avoid close skin-to-skin contact sports until the sores have healed.

Mental health and emotional wellbeing

Herpetic whitlow can cause embarrassment, worry about spreading the virus, and frustration if it comes back. Herpes simplex virus is very common, and having it does not mean you are dirty or careless. If you feel overwhelmed, anxious, or low, talk to a clinician or a trusted person. If you ever feel unsafe or have thoughts of harming yourself, contact your local emergency number or a local crisis support service right away.

Prevention

You can lower the chance of getting or spreading herpetic whitlow by avoiding direct contact with active herpes sores, washing your hands often, keeping broken skin covered, and not sharing towels or personal items. Healthcare workers should use gloves and follow infection control guidance. Children who suck their thumbs may benefit from gentle help to stop, especially during a cold sore outbreak in the family.

Vaccines

There is no vaccine available for herpes simplex virus.

Screening programmes

There is no routine screening for herpetic whitlow. Testing is done when sores are present or when a clinician thinks it is needed. Pregnant women with active herpes sores should tell their maternity team.

Complications

If left untreated

• A bacterial infection can develop on top of the herpes sores, causing more redness, pus, or swelling.
• The virus can spread to the eye and cause keratitis (infection of the clear front part of the eye), which can affect vision if not treated.
• The virus can spread to other parts of the skin, especially if you touch the sore and then touch broken skin.
• Some people have repeated outbreaks, which can be painful and inconvenient.
• A newborn exposed to herpes can become very unwell, so newborn exposure needs urgent medical advice.

Long-term outlook

Most people with herpetic whitlow heal fully within a few weeks. The pain can be significant at first, but it usually settles. Some people have recurrences, which tend to be milder. With good hand hygiene, early medical advice, and careful wound care, serious complications are uncommon. If you are unsure or worried, contact a qualified healthcare provider.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.