Infection of the skin is distinguished from dermatitis, which is inflammation of the skin, but a skin infection can result in skin inflammation. Skin inflammation due to skin infection is called infective dermatitis. Bacterial skin infections affected about 155 million people and cellulitis occurred in about 600 million people in 2013. The skin is the largest organ of human body. Its main role to covers / protect inner parts of the body. It provides a remarkably good barrier against infections. But sometimes the skin itself becomes infected. Microorganisms (Bacteria, Virus, Fungi and Parasite) are one of the main root causes of skin infections. Bacterial skin infection will occur when bacteria (Staphylococcus) enter into the body through a break in the skin (cut or scratch). Some bacterial infections are delicate which can be easily treated. But some infections require an oral antibiotic. Cellulitis and impetigo are two types of bacterial skin infections. Fungal skin infections are common in adolescents and adults. Our body chemistry and lifestyle can increase the risk of fungal skin infections. Funguses are mostly developing in damp areas (feet or armpit) of the body. Wearing sweaty/wet clothes is a risk factor for fungal skin infections. All fungal infections are not contagious, and also these infections are typically non-life-threatening. Fungal skin infections are treated with oral/topical antifungal medicines.