A Thai woman discovered that fluid-filled blisters on her hand were caused by hookworms crawling beneath her skin.
Photos of her affected hand, which show clusters of blister-like bumps, went viral after she shared them online.
The woman had spent an entire day pulling weeds outdoors. That night, she experienced intense itching. By the next morning, she noticed translucent blisters that appeared to move beneath her skin.
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Doctors diagnosed her with cutaneous larva migrans (CLM), a skin condition caused by parasitic hookworm larvae. These larvae are commonly found in soil or sand contaminated by animal faeces.
Hookworm Larvae From Animal Waste Cause Skin Infection
Dr Nathkaphat Rattanapitool, Associate Professor at the Parasitic Disease Research Centre of Suranaree University of Technology and manager of FMC Medical Centre, confirmed the diagnosis.
He explained that CLM is most often caused by larvae from animal hookworms such as Ancylostoma braziliense and Ancylostoma caninum, which are found in the faeces of dogs and cats.
The larvae enter human skin through direct contact with contaminated soil, often when people walk, sit, or lie on the ground without protection. Those living in tropical climates, especially children and people who work with soil, face higher risks of infection.
These parasites cannot develop into adult worms inside the human body. The infection usually resolves on its own within two to eight weeks. However, many patients seek treatment to relieve itching and reduce inflammation.
In humans, CLM typically presents as winding, snake-like tracks beneath the skin. These tracks can move several millimetres to two centimetres per day and are often accompanied by persistent itching. The condition is not life-threatening but causes significant discomfort.
Prevention Methods Against Hookworm Skin Infections
To prevent infection, Dr Nathkaphat advised avoiding direct skin contact with soil or sand.
Using a mat or cloth when sitting or lying outdoors can help. He also recommended regular handwashing before meals and after outdoor activities to remove potential contaminants.
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Pet owners are encouraged to dispose of animal faeces properly and bring pets for regular deworming and check-ups. Anyone who notices unusual skin symptoms should consult a doctor promptly for accurate diagnosis and timely treatment.
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