Hair follicles can easily become infected from sweat and dirt that gets trapped inside. Good hygiene practices will help prevent build up that can lead to infection.
An infection of a hair follicle in the eyelash is called a sty (also spelled as stye). It typically appears as a red and painful lump at the base of an eyelash and is most commonly caused by bacterial infection.
If there is no bump, it is probably just an infection of the hair follicle. An infection or disturbance in the hair follicle can cause pain and discomfort in the area and when you move that piece of hair.
Furuncle
Follicle development occurs in several stages: primordial follicle, primary follicle, secondary follicle, preantral follicle, antral follicle, and mature (Graafian) follicle. Each stage involves specific changes in the follicle and oocyte as they mature towards ovulation.
Skin boil is a skin infection that starts in a hair follicle or oil gland. First skin turns red, then pus will develop in it.
graafian follicle
Hair follicle infections, such as folliculitis, are generally not contagious. They are usually caused by bacteria, fungi, or irritation, rather than being spread from person to person. However, if the infection is due to a contagious agent like certain fungi (e.g., ringworm), it may be transmitted through direct contact or shared items. Practicing good hygiene can help prevent the spread of infections.
A sty is also called a hordeolum. It is a red, painful lump near the edge of the eyelid resulting from an infection of a hair follicle or oil gland.
The infection which is transmitted by inhalation of pathogenic microorganism present in air
STI is not a disease. It's an acronym for Sexually Transmitted Infection(s).Sexually TransmittedDiseases (STI)
Graafian follicle
Follicle.