What are purple spots on your arm?

There are several potential causes for purple spots on your arm, including:

1. Bruises: Bruises occur when small blood vessels under the skin are damaged, causing blood to leak into the surrounding tissue. They can be caused by injuries such as bumps, falls, or sports injuries, or can occur spontaneously due to certain medical conditions.

2. Petechiae: Petechiae are small, round, purple or red spots on the skin that are caused by bleeding from tiny blood vessels. They can be a sign of a variety of conditions, including:

* Vasculitis: Inflammation of the blood vessels

* Platelet disorders: Conditions that affect the blood's ability to clot

* Infections: Such as viral infections, bacterial infections, or fungal infections

* Vitamin C deficiency: Scurvy

* Certain medications: Such as blood thinners

3. Ecchymosis: Ecchymosis is a term used to describe a larger area of skin discoloration caused by bleeding into the tissue. They are often referred to as "black and blue marks" and are common after injuries.

4. Hematomas: Hematomas are large, swollen areas of blood that collect under the skin. They can be caused by significant injuries or trauma.

5. Age spots: Age spots, also known as solar lentigines, are flat, brown or black spots that develop on the skin as a result of sun exposure. They are common in older adults and are not usually a cause for concern.

6. Other medical conditions: In some cases, purple spots on the arm can be a sign of a more serious underlying medical condition, such as:

* Liver disease

* Kidney disease

* Cancer

* Autoimmune disorders

* Certain medications

If you are concerned about purple spots on your arm, it is important to see a doctor for an accurate diagnosis. The doctor will likely perform a physical examination and ask about your medical history and symptoms. Additional tests, such as blood tests or a skin biopsy, may be recommended to determine the cause. Once the cause is identified, appropriate treatment can be recommended.