Every hair on the human body is formed and begins to grow from the hair follicle and comes out on the skin surface. Hair follicles are clearly expressed in the hairy skin of the head, they are located anywhere on the body except the palms, feet, lips and mucosal membranes. Hair follicles play an important role in natural selection processes. Hair form not only a strong barrier that protects the epidermis from scratches and damage by UV rays, there is a huge network of nerve endings around some of the hair follicles, that provides information about environment to tactile and sensory skin receptors. Disorders of hair follicles are divided into infectious and natural. Recently, head skin infections and all sorts of communicable diseases have beenquite common, especially in the East, as carriers of diseases and illnesses, such as bacteria, fungus, viruses and other microorganisms are easily transmitted from person to person. Infectious diseases are often spread by touching the patient or his things, from physical contact with the sick person. In any case such diseases spread very quickly from using the same towel used by the sick person, from contact with infected animals, including pets, or infection may occure through the contact with contaminated soil or water. Public spa pools and contaminated water sources can easily be an original sources of infection, although as those places are very pleasant and warm, but quite often not very clean, so the bacteria may be viable there for a long time and might easily get on human skin. Infectious diseases of hair follicles may be caused by bacteria, fungi, viruses or parasites, though increasingly common skin disease caused by bacteria and fungi. Generalized inflammatory reaction, focusing on the surface layer of the hair follicle is called follikulitis. To simplify a wide range of foliculitis conditions, they are classified into infectious and noninfectious, depending on the clinical manifestations and use of therapeutic techniques. Noninfectious folikulitis may be caused by local or systemic use of corticosteroids. These drugs can cause rashes on the skin in a form of small abcesses, that quickly spread throughout the body. In any case, folliculitis often has an infectious basis, depending on the cause of the disease they are divided on the fungal, bacterial, viral or parasitic. If a person has skin diseases such as eczema, psoriasis, seborrhea, etc., not only the skin gets damaged, but also the hair, they become fragile and break off at the skin level (at a distance of 2-3 mm from the scalp). Although at such conditions besides the hair and scalp skin diseases, frequently increases hair loss and eventual baldness. In addition you need to bear in mind that hair loss and hair diseases are very often related to mechanical hair damages, lack of or poor hair care, with the weakening of the structure of the hair due to the weakening of the internal state of general body health, physical and emotional state of a person. In any case, if there is an apparent disease of hair or head skin, you should take care by not only treating it by specific medication and general health promotion, but also always apply an appropriate daily care of the head skin and hair, as well as compliance with the basic rules of personal hygieneis a must. In all cases, these diseases should be treated by a dermatologist or trichologist, also only specific professional medications and products shall be used for treatment.