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Angioedema is an area of swelling of the lower layer of skin and tissue just under the skin or mucous membranes. [1] [3] The swelling may occur in the face, tongue, larynx, abdomen, or arms and legs. [1] Often it is associated with hives, which are swelling within the upper skin. [1] [3] Onset is typically over minutes to hours. [1]
Normal C1 inhibitor level hereditary angioedema is thought to involve various mutations that increased bradykinin activity and cause a decreased threshold for activation of the plasma contact system thus leading to the symptoms of angioedema. [7] Hereditary angioedema with normal C1-inhibitor is a genetically heterogeneous disorder.
What it looks like: Fifth Disease is caused by Parvovirus B19 and presents with a red rash on the cheeks, arms, and legs that can last for several weeks. This condition occurs most often in children.
It can be caused by systemic diseases, pregnancy in some women, either directly or as a result of heart failure, or local conditions such as varicose veins, thrombophlebitis, insect bites, and dermatitis. [33] Non-pitting edema is observed when the indentation does not persist.
This article provides a list of autoimmune diseases. These conditions, where the body's immune system mistakenly attacks its own cells, affect a range of organs and systems within the body. Each disorder is listed with the primary organ or body part that it affects and the associated autoantibodies that are typically found in people diagnosed ...
Schamberg's disease, or progressive pigmented purpuric dermatosis, is a chronic discoloration of the skin which usually affects the legs and often spreads slowly. This disease is more common in males and may occur at any age from childhood onward. This condition is observed worldwide and has nothing to do with race or ethnic background. [3]
Often no specific cause for the eruptions is found. However, it is sometimes linked to underlying diseases and conditions such as: Food (including blue cheese or tomatoes). Contact Dermatitis (i.e. cleaning agents, fabric softeners, etc.) Fungal, Bacterial and Viral infections such as sinusitis, tuberculosis, candidiasis or tinea.
Characteristic signs and symptoms include: Skin rash: The most prominent feature is a reddish-purple rash that appears on the lower legs, typically below the knees and above the ankles. The rash is often described as blotchy, mottled, or net-like (reticular in appearance). [6] [7] In some cases, the rash may extend to the dorsum of the feet. [8]