What can cause hyperemia?

Inflammation. When tissue is injured, the body sends white blood cells and other immune cells to the area to help fight off the infection or injury. These cells release chemicals that cause the blood vessels in the area to dilate, which increases blood flow and brings more oxygen and nutrients to the tissue.

Infection. Infections can also cause hyperemia, as the body's immune system works to fight off the invading microorganisms.

Exercise. Exercise can cause hyperemia in the muscles that are being used, as the body needs to deliver more oxygen and nutrients to these muscles to support their increased activity.

Emotional stress. Emotional stress can cause hyperemia in the face, neck, and chest, as the body's sympathetic nervous system is activated and the heart rate and blood pressure increase.

Certain medications. Some medications, such as vasodilators and beta-blockers, can cause hyperemia as a side effect.

Heat exposure. Exposure to heat can cause the blood vessels in the skin to dilate, which can lead to hyperemia.

Sunburn. Sunburn can cause hyperemia in the affected area, as the body's inflammatory response is activated to help heal the damaged skin.