redness和肿胀?

** Redness**

• Redness is a common symptom of inflammation and injury.
• It is caused by increased blood flow to the area.
• Redness can be caused by a number of factors, including infection, injury, and inflammation.

** Swelling**

• Swelling is a common symptom of fluid retention and inflammation.
• It is caused by increased blood volume and fluid pressure.
• Swelling can be caused by a number of factors, including injury, infection, and inflammation.

** Redness and swelling**

• Redness and swelling can be caused by a number of factors, including infection, injury, and inflammation.
• The exact cause of redness and swelling will depend on the underlying cause.
• Redness and swelling can be a sign of a serious medical condition, so it is important to seek medical attention if you experience this symptom.