Cutaneous Larva Migrans - Symptoms, Causes & Treatment
By ScanSkinAI Editorial Team✓ Reviewed for medical safetyLast updated June 2026
A skin infection caused by hookworm larvae from infected animal feces, typically acquired by walking barefoot on contaminated soil or beaches.
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Quick Answer
Cutaneous larva migrans is a skin infection caused by animal hookworm larvae that burrow into your skin. People usually catch it by walking barefoot or sitting on sandy beaches or soil contaminated by dog or cat feces. It creates intensely itchy, raised, winding red tracks that slowly creep across the skin, usually on the feet, legs, or buttocks. While the infection eventually clears on its own because the larvae cannot survive permanently in humans, doctors often prescribe anti-parasitic medication to stop the intense itching and resolve the eruption quickly.
Symptoms
- Intensely itchy, raised, serpiginous (winding) tracks
- Tracks move slowly (few mm per day)
- Usually on feet, legs, or buttocks
- Blistering along tracks
Causes & Risk Factors
- Animal hookworm larvae (from dog or cat feces)
- Walking barefoot on contaminated soil/sand
- Common in tropical and subtropical areas
Treatment & Management
- Ivermectin (oral)
- Albendazole
- Topical thiabendazole
- Self-limited but treatment speeds resolution
When to See a Doctor
If you develop itchy, moving tracks after beach or soil exposure
Frequently Asked Questions
What does cutaneous larva migrans look like?
It typically appears as a raised, red, winding line on the skin that looks like a tiny snake or thread just beneath the surface. These wavy tracks are intensely itchy and often have small blisters along them. You will usually notice the tracks slowly moving or lengthening by a few millimeters each day as the larva burrows further into the skin. Typical spots include the feet, lower legs, or buttocks.
How do you catch this hookworm infection?
You catch it when microscopic hookworm larvae penetrate your bare skin. These larvae come from the feces of infected animals, like dogs or cats, which contaminate moist soil or sand. This is why cases frequently happen after people walk barefoot on tropical beaches, sit directly on the sand, or work in damp soil without protective clothing. It is not passed from person to person.
How is cutaneous larva migrans treated?
Although the larvae eventually die and the rash clears on its own, the intense itching usually requires treatment. Doctors typically prescribe anti-parasitic medications to kill the worms. This is often an oral tablet, such as ivermectin or albendazole, though a topical cream is sometimes used. These safely tested medications quickly stop the itching and halt the progression of the creeping tracks within a few days.
Will the worms spread inside my body?
No, the animal hookworms that cause cutaneous larva migrans cannot survive or mature inside the human body. They lack the enzymes needed to penetrate deeper than the top layers of your skin. Because they are trapped there, they eventually die on their own without spreading to your blood or internal organs. However, scratching the extremely itchy tracks can lead to secondary bacterial skin infections.
How can I prevent getting this infection on vacation?
The best way to protect yourself in tropical and subtropical areas is to avoid direct skin contact with contaminated wet sand or soil. Always wear shoes or sandals when walking on the beach, and avoid lying directly on the sand. Use a raised chair or a clean, thick towel instead. Additionally, avoiding areas where stray dogs or cats are known to roam can drastically reduce your risk.
When should I see a doctor for this rash?
You should consult a healthcare provider as soon as you notice itchy, winding, or moving red tracks on your skin, especially if you have recently traveled to a tropical area or spent time walking barefoot outdoors. A doctor can confirm the diagnosis and prescribe specific anti-parasitic medications to quickly relieve the severe itching and prevent you from developing a bacterial infection from heavy scratching.
Is it safe to freeze or cut the larva out of my skin?
No, you should never attempt to cut out or freeze the larva yourself. This is an old myth and a dangerous practice. Because the visible end of the track is often slightly behind where the microscopic larva actually is, trying to remove it physically almost always fails. It only causes unnecessary tissue damage, scarring, and opens you up to painful secondary bacterial infections.
How can ScanSkinAI help with cutaneous larva migrans?
ScanSkinAI acts as an initial screening aid to help you log and track unusual, itchy skin rashes. By taking regular photos, you can document how much a track moves daily, providing helpful visual evidence for your doctor. However, ScanSkinAI is not a diagnostic tool. You must consult a qualified healthcare professional who can clinically evaluate the eruption and prescribe the correct anti-parasitic medication.
Medical References
Information on this page is sourced from and verified against reputable medical resources:
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.