What would cause the blood vessels to temporarily pop up and hurt in arms?

Several factors can cause blood vessels in the arms to temporarily pop up and hurt. Here are some potential causes:

1. Dehydration: When the body is dehydrated, the blood vessels become more prominent and may feel sore or painful. Drinking plenty of fluids can help reduce dehydration and alleviate the discomfort.

2. Muscle Strain: Overusing or straining the muscles in the arms can lead to temporary pain and discomfort in the blood vessels. This can occur during strenuous physical activity or repetitive movements. Resting the affected muscles and applying cold compresses can help relieve the pain.

3. Nutrient deficiencies: Certain nutrient deficiencies, such as vitamin B12, can cause anemia, which can lead to poor circulation and visible, painful veins. Eating a balanced diet or taking supplements as recommended by a doctor can help address nutrient deficiencies.

4. Vasculitis: Vasculitis is a condition characterized by inflammation of the blood vessels. It can cause pain, redness, and swelling in the affected area. Vasculitis can be caused by various underlying medical conditions and requires proper diagnosis and treatment by a healthcare professional.

5. Hormonal changes: Fluctuating hormone levels, particularly during pregnancy or menopause, can affect the elasticity of blood vessels and cause them to become more prominent and sensitive. These changes are usually temporary and may subside once the hormone levels stabilize.

6. Blood clots: In rare cases, pain and swelling in the arms accompanied by visible blood vessels can indicate a blood clot or deep vein thrombosis (DVT). This is a serious condition that requires immediate medical attention.

If the pain or discomfort in your arms persists or is accompanied by other concerning symptoms, it's essential to consult a doctor for an accurate diagnosis and appropriate treatment.