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Erysipelas (/ ˌ ɛ r ə ˈ s ɪ p ə l ə s /) is a relatively common bacterial infection of the superficial layer of the skin (upper dermis), extending to the superficial lymphatic vessels within the skin, characterized by a raised, well-defined, tender, bright red rash, typically on the face or legs, but which can occur anywhere on the skin.
Typically, over the upper inner thighs, there is a red raised rash with a scaly well-defined border. There may be some blistering and weeping, and the rash can reach near to the anus . [ 3 ] The distribution is usually on both sides of the groin and the center may be lighter in colour. [ 8 ]
Pityriasis rosea is a type of skin rash. [2] Classically, it begins with a single red and slightly scaly area known as a "herald patch". [2] This is then followed, days to weeks later, by an eruption of many smaller scaly spots; pinkish with a red edge in people with light skin and greyish in darker skin. [4]
In people with dark skin tones, pigmentary changes such as hypopigmentation (loss of color) are common, while in those with lighter skin color, hyperpigmentation (increase in skin color) is more common. Because infected skin tans less than uninfected skin, resulting in uneven tanning, the term "sun fungus" is sometimes used.
Animals including dogs and cats can also be affected by ringworm, and the disease can be transmitted between animals and humans, making it a zoonotic disease. Specific signs can be: red, scaly, itchy or raised patches; patches may be redder on outside edges or resemble a ring; patches that begin to ooze or develop a blister
Purpura (/ ˈ p ɜːr p jʊər ə / [1]) is a condition of red or purple discolored spots on the skin that do not blanch on applying pressure. The spots are caused by bleeding underneath the skin secondary to platelet disorders, vascular disorders, coagulation disorders, or other causes. [2]
Layers of normal human skin. Cellulitis indicates infection in the dermis and/or subcutaneous (fat) layer. Upon the initial exposure of Streptococcus pyogenes (group A beta-hemolytic streptocci) bacteria to the skin surrounding the perianal region, the bacteria adheres to the skin's surface with filaments on its cell wall surface called adhesins.
Dermatitis is a term used for different types of skin inflammation, typically characterized by itchiness, redness and a rash. [1] In cases of short duration, there may be small blisters, while in long-term cases the skin may become thickened. [1]