![]() Immune disorders such as idiopathic thrombocytopenic purpura (ITP) or immune thrombocytopenia.Drugs or medications that affect platelet function or clotting.The cause of purpura depends on the type.Ĭommon causes of thrombocytopenic purpura are: What are the most common causes of purpura? In adults, purpura is usually a sign of an underlying condition but can also resolve without treatment. Children typically recover quickly and without treatment. It’s slightly more common in adults than in children. Purpura larger than 1 centimeter (cm) is called ecchymoses (or bruises). If the purpura spot is less than 4 mm wide, it’s called petechiae. Purpura is between 4 millimeters (mm) and 10 mm in diameter. What is the difference between petechiae and purpura? This type of purpura happens when our blood vessels become weak. If you have senile purpura, you may have bruises or spots on the skin due to age or sun exposure. Disseminated intravascular coagulation (DIC): Your blood over clots because proteins that control blood clotting are overactive.Warfarin-induced skin necrosis: Your skin’s tissue dies after a negative reaction to the drug warfarin.Heparin-induced thrombocytopenia: Occurs when a negative reaction to the drug heparin makes your body clot too much.Other serious (but rare) types of purpura require emergency medical treatment. The cause of purpura isn’t related to your platelet level. A person with nonthrombocytopenic purpura has platelet levels in a normal range.A person with thrombocytopenic purpura has low platelet counts.Platelets help your blood clot and prevent severe bleeding. The two main types of purpura are related to blood platelet levels. It’s most common on your limbs (arms, hands, feet and legs) but can appear in your mouth or on any other mucus membrane. Purpura can develop anywhere on your skin. ![]() Applying pressure to the area doesn’t affect the color (blanching the skin). Purpura usually consists of smaller dots that cluster in a specific area but may appear as one larger patch. Purpura is commonly referred to as a blood spot under your skin. ![]() They look red or purple on lighter skin tones but appear brown or black on darker skin tones. Purpura is small, flat spots on your skin. Your healthcare provider should treat bleeding or bruising under your skin (that isn’t from a known injury), as it may be a sign of a more serious condition. They’re classified based on the underlying condition causing them. There are many different types of purpura. Purpura can also be caused by drug interactions, vitamin deficiencies or congenital disorders. Purpura isn’t a medical condition but a sign of another condition causing the bleeding. They happen when small blood vessels leak blood under your skin’s surface. Purpura may resemble a bruise or look like a spot of blood under your skin. For example, they may appear brownish-black on darker complexions and reddish-purple on lighter complexions. The spots appear differently depending on your skin tone. Purpura is purple spots or patches on your skin or in your mucus membranes (such as your mouth and throat). ![]()
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