Worm holes on your scalp are most often caused by cysticercosis which is an infection caused by the larvae of the parasite Taenia solium.
The cysticercosis infection occurs after a person swallows tapeworm eggs.
The larvae get into tissues such as muscle and brain, and form cysts there (these are called cysticerci).
Fungi called dermatophytes cause ringworm of the scalp.
Fungi are organisms that thrive on dead tissue, such as fingernails, hair, and the outer layers of your skin.
Dermatophytes prefer warmth and moisture, so they thrive on sweaty skin.
Overcrowding and poor hygiene increase the spread of ringworm.
Parasites that live in human hair are Demodex folliculorum and Demodex brevis parasites.
Demodex brevis is one of the two species of face mite that inhabit humans.
They are very similar to Demodex folliculorum.
They are usually found in the sebaceous glands of the human body.
Horse Hair Worms also live in human hair.
Horsehair worms, part of the taxonomic phylum Nematomorpha, are parasitic worms that resemble long thin strands of hair (hence their nickname).
Head Lice is also another common parasite that can live on human hair.
The head louse (Pediculus humanus capitis) is an insect parasite, spending its entire life on human hair and feeding exclusively on blood, 4-5 times daily.
Man is the only known host of this parasite.
The head louse is an obligate ectoparasite of humans.
Head lice are wingless insects that spend their entire lives on the human scalp and feeding exclusively on human blood.
Humans are the only known hosts of this specific parasite, while chimpanzees host a closely related species, Pediculus schaeffi.
A head lice infestation results from the direct transfer of lice from the hair of one person to the hair of another through head-to-head contact.
To survive, an adult head louse must feed on blood.
They can live for approximately 30 days on a person's head.
Signs of hair lice or head lice include.
Intense itching on the scalp, body or in the genital area.
Tickling feeling from movement of hair.
Lice on your scalp, body, clothing, or pubic or other body hair.
Lice eggs (nits) on hair shafts.
Sores on the scalp, neck and shoulders.
Bite marks especially around the waist, groin, upper thighs and pubic area.