Kerion is the result of the host's response to a fungal ringworm infection of the hair follicle

Hair follicle

A hair follicle is a skin organ that produces hair. Hair production occurs in phases, including a growth phase , and cessation phase , and a rest phase . Stem cells are principally responsible for the production of hair....

s of the scalp

Scalp

The scalp is the anatomical area bordered by the face anteriorly and the neck to the sides and posteriorly.-Layers:It is usually described as having five layers, which can conveniently be remembered as a mnemonic:...

 and beard

Beard

A beard is the collection of hair that grows on the chin, cheeks and neck of human beings. Usually, only pubescent or adult males are able to grow beards. However, women with hirsutism may develop a beard...

accompanied by secondary bacterial infection(s). It usually presents itself as raised, spongy lesions. This honeycomb is severely painful inflammatory reaction with deep suppurative lesion on the scalp. The follicle may be seen discharging pus. there may be sinus formation and rarely mycetoma like grains are produced.It is usually caused by Zoophilic dermatophytes like T. verrucosum and T. mentagrophytes.