1. Eliminating rash and relieving itching: Xu Changqing contains paeonol, which is an ingredient in many antipruritic drugs. It can be applied externally to eczema, itching or redness after being bitten by mosquitoes, which can relieve the symptoms well.

2. Antibacterial and anti-inflammatory: Xu Changqing contains flavonoid glycosides, which has a strong antibacterial effect and can hinder the proliferation of bacteria, thus playing an antibacterial and anti-inflammatory role.

3. Analgesia: Xu Changqing has a remarkable analgesic effect, which can treat low back pain, toothache, abdominal pain and pain caused by various injuries, and can also relieve the pain left over from various operations.

4. Treatment of snake venom: Xu Changqing also has a certain therapeutic effect on snake bites. You can take a fresh Xu Changqing plant and mash it, and then apply it to the wound, or you can use it with drugs with similar effects, such as Lobelia chinensis.

5. Reducing blood lipid: Xu Changqing can effectively reduce the concentration of blood lipid, which can help to reduce blood lipid.