Cutaneous pili migrans

Cutaneous pili migrans (CMP) is a piece of hair embedded in skin, typically appearing as a dark or reddish creeping dot or thread, in a similar presentation to cutaneous larva migrans.^[1][2] There may be associated pain, though generally no itch.^[3]

Cutaneous pili migrans
Symptoms	Creeping dot or thread under skin[1]
Causes	Trauma, no cause[1]
Diagnostic method	Appearance[1]
Differential diagnosis	Cutaneous larva migrans[1]
Treatment	Remove hair[1]
Prognosis	Good[1]
Frequency	Rare[1]

Signs and symptoms

CMP typically presents as a non-itchy dark or reddish creeping dot or thread, in a similar appearance to cutaneous larva migrans.^[1]

Cause

CMP may follow an injury or appear without cause.^[1]

Diagnosis and treatment

Diagnosis is by its appearance and may require a magnifying glass.^[1] Treatment is by removing the piece of hair.^[1]

Epidemiology and history

CMP is rare.^[1] The first description was given by Howard S. Yaffee in 1957.^[3][4]