Dermatitis is a term used to describe inflammatory processes on the skin caused by various factors and characterized by diverse clinical manifestations. The initial section explains what dermatitis is and presents different types of this condition, including atopic, contact, and seborrheic dermatitis. The research focuses on the causes and development of dermatitis, analyzing genetic, environmental, and immunological factors that contribute to its onset. Statistical data is used to explore the prevalence of dermatitis and its epidemiology, with a particular focus on different population groups. Dermatitis is thoroughly described through its symptoms and signs, with a special focus on the different types and their varying severity, most commonly presenting with dry skin, redness, and intense itching. For diagnostic purposes, essential steps include clinical examination, medical history, and laboratory tests such as allergy testing, skin barrier tests, skin biopsy, serum IgE tests, and patch testing, carefully excluding other potential skin conditions. A dedicated chapter addresses dermatitis treatment, describing medical treatments such as topical and oral medications, including topical corticosteroids, topical immunomodulators, systemic corticosteroids, and biologics, as well as the role of physiotherapy in alleviating symptoms. Physiotherapeutic intervention techniques, such as phototherapy, cryotherapy, hydrotherapy, and patient education on proper skin care, emphasize the importance of emollients and moisturizing creams. The importance of a multidisciplinary approach to treatment is highlighted to improve the quality of life of those affected. To prevent dermatitis, it is essential to maintain proper hygiene, avoid known allergens and irritants, and provide patient education, which also plays a crucial role in preventing recurring episodes of the disease.