👉 Erythroderma, also known as hyperemia or hyperthermia, is a condition in which an excessive production of blood cells leads to a thickening and scarring of the skin. This condition can occur in various parts of the body, including the feet, arms, legs, and scalp. The excess blood cells can cause inflammation and swelling, leading to redness, warmth, and sometimes pain. It is often associated with certain medical conditions such as diabetes, liver disease, or cancer