Purpura is purple-colored spots and patches that occur on the skin, organs, and in mucus membranes, including the lining of the mouth.
Purpura occurs when small blood vessels under the skin leak.
When purpura spots are very small, they are called petechiae. Large purpura are called ecchymoses.
Platelets help the blood clot. A person with purpura may have normal platelet counts (nonthrombocytopenic purpuras) or decreased platelet counts (thrombocytopenic purpuras).
Nonthrombocytopenic purpuras may be due to:
- Congenital rubella syndrome
- Drugs that affect platelet function
- Fragile blood vessels (senile purpura)
- Pressure changes that occur during vaginal childbirth
- Inflammation of the blood vessels (vasculitis), such as Henoch-Schonlein purpura
Thrombocytopenic purpura may be due to:
- Drugs that prevent platelets from forming
Idiopathic thrombocytopenic purpura (ITP)
- Immune neonatal thrombocytopenia (can occur in infants whose mothers have ITP)
When to Contact a Medical Professional
Call your doctor for an appointment if you have signs of purpura.
What to Expect at Your Office Visit
Your doctor will examine your skin and ask you questions about your medical history and symptoms, including:
- Is this the first time you have had such spots?
- When did they develop?
- What color are they?
- Do they look like bruises?
- What medications do you take?
- What other medical problems have you had?
- Does anyone in your family have similar spots?
- What other symptoms do you have?
A skin biopsy may be done.
Blood spots; Skin hemorrhages