Plantar warts: causes, home remedies & medical treatment

Plantar warts (verrucae plantares): Recognizing and treating stubborn warts on the foot

The most important facts in brief:

Plantar warts are widespread skin growths on the soles of the feet caused by viruses, which often grow painfully deep into the skin. Infection usually occurs in swimming pools or gyms. Treatment requires patience: there are various therapeutic approaches, from special plasters and acid solutions to icing. Doctors can make a diagnosis via TeleClinic based on photos and prescribe suitable medication.

What are plantar warts?

Plantar warts (medical term: verrucae plantares) are benign skin lesions caused by an infection with human papillomaviruses (HPV) that occur almost exclusively on the sole of the foot. In contrast to normal warts, they do not grow outwards due to the constant body pressure when walking and standing, but rather deep into the subcutaneous fatty tissue – similar to a thorn. This often makes them particularly painful and difficult to treat. They usually form a horny surface and can occur individually or in groups (mosaic warts).

Causes and infection: How do plantar warts develop?

Plantar warts are triggered by human papillomaviruses (usually HPV types 1, 2, 4 or 63). The virus penetrates the uppermost layer of skin via tiny cracks or injuries and stimulates the cells there to grow excessively.

As viruses survive particularly long in warm and humid environments, the risk of infection is particularly high in the following places:

• Swimming pools and saunas
• Communal showers in sports clubs
• Changing rooms and hotel rooms

Important to know: The incubation period – i.e. the time from infection to the wart becoming visible – is very variable. It can range from a few weeks to several months or even years. A weakened immune system or circulatory disorders can promote infection.

Symptoms: How can I recognize a plantar wart on my foot?

Plantar warts are often confused with corns, but can be distinguished by specific characteristics. Typical signs are

• Location: Mostly on stressed areas of the sole of the foot (heel, ball of the foot, underside of the toes).
• Appearance: Flat, keratinized area with a softer center. Small black or dark red dots are often visible (bleeding capillaries).
• Pain: A sharp pain when walking, often described as if you had a stone in your shoe or a thorn in your foot.
• Differentiation from corns: Corns usually hurt when pressure is applied from above, plantar warts tend to hurt when pressure is applied from the side (compression).

Treatment: Removing and treating plantar warts

Many sufferers look for ways to get “plantar warts gone in 3 days”. Expectation management is important here: as plantar warts reach deep into the tissue, treatment is often lengthy and requires patience over several weeks. There are various strategies for removing stubborn plantar warts.

1. self-treatment with over-the-counter remedies

Various products are available in pharmacies to treat plantar warts, which soften the keratinized tissue layer by layer (keratolysis):

• Plantar wart plasters: These often contain salicylic acid. They are applied directly to the wart and soften the callus, which can then be carefully removed.
• Solutions and tinctures: Preparations with salicylic acid or lactic acid are regularly dabbed on.
• Icing (cryotherapy): Sprays for home use freeze the top layer of skin, but are often less effective than medical icing.

2. medical therapy options

If home remedies do not work or the wart is very painful, medical methods are available:

• Prescription solutions: Higher concentrated acids (e.g. salicylic acid combined with 5-fluorouracil) that inhibit cell growth.
• Professional cyrotherapy: Doctors use liquid nitrogen to kill the wart tissue at very low temperatures.
• Laser therapy: The wart tissue can be vaporized or the blood supply to the wart can be obliterated using a laser.
• Surgical removal (curettage): Scraping out the wart with a sharp spoon is used less frequently today and only in very therapy-resistant cases, as it can lead to scarring.

When should you seek medical advice?

Although some warts heal spontaneously, this often takes a long time in the case of plantar warts due to their depth. You should consult a doctor if:

• The wart causes severe pain when walking and restricts everyday life.
• The wart bleeds, becomes inflamed or rapidly increases in size.
• you suffer from diabetes mellitus or circulatory disorders (we strongly advise against self-experimentation!).
• you are unsure whether it is actually a wart or another skin change.

How can TeleClinic help with plantar warts?

You don’t necessarily have to sit in a waiting room for the diagnosis and treatment of plantar warts. You can request medical help quickly and discreetly via the TeleClinic platform.

This is how it works:

• Online questionnaire: You answer questions about your symptoms and upload photos of the affected skin area.
• Medical assessment: A doctor will check your details. The visual impression is often sufficient for a reliable diagnosis.
• Prescription & treatment plan: If medically necessary, you will receive a prescription for effective solutions or tinctures directly to your smartphone at your doctor’s discretion.

You will also receive precise instructions on how to use the prescribed medication to remove the plantar wart effectively and safely.

Prevention: How to protect yourself from a new infection

Simple hygiene measures help to prevent plantar warts on the foot:

• Wear slippers in swimming pools, saunas and hotel rooms.
• Dry the spaces between your toes thoroughly after showering.
• Nourish dry and cracked skin on the feet with creams to strengthen the natural skin barrier.
• Change your socks daily and make sure you wear breathable shoes.

Sources/evidence

• AWMF guideline: HPV-associated lesions of the external genital region and anus (in analogy to wart treatment), status 2023
• Robert Koch Institute: RKI guide to human papillomaviruses
• German Dermatological Society: Patient information warts