Principles of Wart Treatment: A Comprehensive Guide

What are warts and how do they occur?

A wart is a benign skin lesion caused by infection with the human papillomavirus ( HPV ). The virus enters the surface layers of the skin, multiplies in epidermal cells, and causes excessive cell growth and the formation of rough, flesh-like bumps on the skin.

More than 150 different types of HPV have been identified, some of which cause common skin warts and others genital warts. The important point is that in many people, the immune system can spontaneously control the virus and eliminate the warts within one to two years; but in people with weakened immune systems, the lesions may be resistant, recurrent, or spread.

Types of warts

Knowing the type of wart plays a decisive role in choosing a treatment method. The most important types are:

1. Common Wart (Verruca Vulgaris)

The most common type of wart with a rough, raised appearance and skin or gray color, most often seen on the hands, fingers and around the nails.

2. Plantar Wart (Verruca Plantaris)

It grows on the sole of the foot and is pressed into the skin by the weight of the body and may be confused with a callus or corn. This type is often painful and may have tiny black dots (capillary blood clots).

3. Flat Wart (Verruca Plana)

Small, flat, skin-colored lesions that are most commonly seen on the face, neck, and back of the hands, usually appearing in clusters; more common in children and adolescents.

4. Filiform warts

Long, thin, string-like bumps that often appear around the mouth, nose, and eyes.

5. Periungual warts

It grows around and under the nail and can damage nail growth; it is more difficult to treat than other types.

6. Genital Wart (Condyloma Acuminatum)

It occurs in the genital and anal areas and is transmitted through sexual contact; some types of its causative agent (such as HPV 16 and 18) carry a risk of cancer and must be treated by a doctor.

Transmission routes and risk factors

HPV is spread through direct skin-to-skin contact or contact with contaminated surfaces. The virus usually enters through scratches, cuts, and tiny cracks in the skin.

• Sharing contaminated towels, slippers, nail files, and personal items
• Walking barefoot in swimming pools, locker rooms, and public bathrooms
• Nail biting and cuticle pulling, which opens the way for the virus to enter
• Unprotected sexual contact (in genital warts)

Wart diagnosis

In most cases, the diagnosis of warts is made clinically and by examination by a doctor. Features that aid in diagnosis include:

• Fitzpatrick Sign: By scratching the surface of the wart, tiny black dots (looking like angry pimples) appear, which are actually capillary clots.
• Disruption of skin lines: In plantar warts, the natural skin lines over the lesion are disrupted; unlike corns, which preserve the skin lines.

In suspicious cases, the doctor may use dermoscopy or, in rare cases, a biopsy (sampling) to rule out other lesions, such as skin cancer.

General principles of wart treatment

Wart treatment is based on four fundamental principles:

1. Destruction of infected tissue: The destruction of virus-infected cells with chemicals, cold, heat, or physical methods.
2. Stimulating the immune response: Awakening the body's immune system to identify and destroy the virus; because warts are ultimately treated by the body's own immune system.
3. Patience and regular follow-up: Treating warts, especially plantar warts, often takes weeks to months and requires repeated sessions.
4. Choosing treatment based on location: The type of wart, its location, the number of lesions, the patient's age, and the history of previous treatments determine the treatment method.

An important point in estimating success rates: In about two-thirds of cases, warts disappear spontaneously within 1 to 2 years; but due to their contagiousness, potential for spread, and psychological impact, active treatment is usually preferred.

Factors affecting the choice of treatment method

Topical treatments

1. Salicylic Acid

It is the first-line treatment for non-genital warts. It gradually sloughs off infected cells (keratolysis), causes mild local inflammation that stimulates an immune response, and has been reported to have a success rate of about 70% in studies.

Correct method of use:

1. Soak the area with warm water to soften the skin.
2. Gently scrape the surface of the wart with a disposable file or pumice stone (avoid sharing tools).
3. Apply the medicine only to the wart and protect the surrounding healthy skin (with Vaseline or tape).
4. Cover it and repeat this daily, usually for up to 12 weeks.

2. Trichloroacetic acid (TCA)

A caustic agent applied by a doctor and used for large warts, genital warts, and during pregnancy (due to its relative safety). Multiple sessions may be required, 1 to 3 weeks apart.

3. Contraindications and other medications

Other topical medications such as podophyllin and podofilox (mainly for genital warts) and imiquimod (with an immune-based mechanism) are also prescribed by the doctor, which are explained in the following sections.

Physical destruction methods

Cryotherapy (freezing therapy)

Freezing warts with liquid nitrogen (temperatures around -196 degrees Celsius) is the most common in-office treatment. The extreme cold causes blistering under the lesion, and the infected tissue peels off within 1 to 2 weeks. Usually, 2 to 4 sessions are needed, spaced 3 to 4 weeks apart. Mild to moderate pain, blistering, and sometimes temporary skin discoloration are possible side effects.

Curettage and electrocautery

In this method, the doctor scrapes the wart with a bladed instrument (curettage) and then burns its base with an electric current (electrocautery). It is effective for large, single warts, but it is more likely to cause scarring.

Laser treatment

Pulsed dye lasers (PDL) and CO₂ are used for warts that are resistant to other treatments, extensive warts, and plantar warts. Vascular lasers work by cutting off the blood supply to the lesion and usually leave less scarring, but are more expensive.

Repeated treatments (Needling)

In resistant plantar warts, the needling method introduces the virus into the deep layers of the skin and immune system by causing controlled bleeding, and induces a strong systemic immune response; high success rates have been reported in resistant warts.

Surgical incision

Complete surgical removal is not recommended as a first-line treatment because it results in painful wounds, scarring, and a high chance of recurrence, and the virus may remain in the surrounding skin.

Immune system stimulation therapies

Imiquimod

An immunomodulatory cream that increases interferon production and is used primarily for genital warts and facial warts. Its effect is gradual and may take weeks.

Intralesional injection

For resistant warts, your doctor may inject immunogenic antigens (such as the MMR or candida vaccine), bleomycin, or interferon directly into the lesion. These methods induce a systemic immune response and can also treat warts distant from the injection site.

Zinc and supplements

In some studies, oral zinc supplementation has helped improve treatment response in patients with low zinc levels, but the evidence is limited and does not replace the main treatment.

Genital Wart Treatment

Genital warts are of particular importance in terms of treatment and general health and must be examined and treated by a specialist . The principles are:

• A complete examination of the genital and anal area, and in women, a cervical examination and a Pap smear test due to the association of some types of HPV with cervical cancer.
• Treatment with podofilox, imiquimod, or syncatechin (self-administration) or cryotherapy, TCA, and laser (in the office)
• Abstaining from sex until treatment is complete and using condoms to reduce the risk of transmission
• Screening tests for other sexually transmitted infections
• Sexual partner education and assessment if there is a lesion

Home remedies and traditional medicine: reality or illusion?

There are many home remedies for warts, but most of them are unproven:

• Duct Tape: Some small studies have shown an effect and some have had the opposite results; there is no definitive evidence.
• Garlic, apple cider vinegar, and herbal extracts: These substances may cause chemical burns, ulcers, and scarring due to their high acidity and are not proven for the virus.
• Tying with thread or hair: It is dangerous and useless and can cause infection and bleeding.

Aftercare

Proper care of the treated area will speed up healing and reduce the risk of recurrence and infection:

• Keep the area clean and dry, and avoid picking at the skin and blisters.
• Blistering is normal after cryotherapy; see a doctor if there is severe pain or pus discharge.
• Avoid scratching or picking at the treated area to prevent the virus from spreading.
• For plantar warts, use soft slippers or pressure-relieving cushions.
• Follow up with subsequent treatment sessions as directed by your doctor; stopping treatment early is the most common cause of relapse.
• Keep personal items (towels, razors, combs) separate.

HPV prevention and vaccine

The most effective way to prevent genital warts and some skin warts is the HPV vaccine , which protects against high-risk and common types of the virus and is recommended for boys and girls, preferably before they begin sexual activity.

Other ways to prevent:

• Wearing slippers in the pool, public bath, and locker rooms
• Avoid sharing towels, shaving equipment, and manicure tools.
• Moisturizing and caring for the skin of the hands, especially when doing cleaning work (using gloves)
• Avoid biting your nails and pulling your cuticles.
• Strengthening general health and controlling underlying diseases that affect the immune system

Common mistakes in treating warts

1. Picking or cutting warts at home: Causes bleeding, infection, spreading the virus, and scarring.
2. Early discontinuation of treatment: Virus may persist in surrounding apparently healthy skin; treatment should be continued until the lesion bed is completely cleared.
3. Use of household acidic substances (vinegar, etc.): burns and tissue damage without proven effectiveness.
4. Mistaking warts for corns or other lesions: Incorrect treatment wastes time and money; any persistent skin lesion should be diagnosed.
5. Ignoring genital lesions: These lesions require medical evaluation and screening.

Frequently Asked Questions