As a medical professional with expertise in hematology, I can provide you with an informed explanation of the causes of purpura. Purpura refers to the appearance of purple-red spots on the skin or mucous membranes due to bleeding from small blood vessels. There are several types of purpura, and the causes can vary:

1. **Allergic Purpura (Henoch-Schönlein purpura)**: This is often triggered by an immune system response to an infection, certain medications, or foods.

2. Thrombocytopenic Purpura: This occurs when there is a low platelet count, which can be due to bone marrow disorders, certain medications, or autoimmune diseases.

3. Senile Purpura: This type is common in the elderly and is caused by the thinning of the skin and weakening of blood vessels.

4. Traumatic Purpura: This is caused by physical injury or trauma to the skin.

5. Factitious Purpura: This is self-inflicted and can be a result of deliberate skin picking or scratching.

6. Vascular Purpura: This is due to a problem with the blood vessels themselves, such as collagen vascular diseases or infections.

It's important to note that the specific cause of purpura in an individual can only be determined through a thorough medical examination and possibly additional diagnostic tests.

read more >>

The following could cause nonthrombocytopenic purpura: disorders that affect blood clotting. certain congenital disorders, present at or before birth, such as telangiectasia (fragile skin and connective tissue) or Ehlers-Danlos syndrome. certain medications, including steroids and those that affect platelet function.read more >>