Bloodletting therapy, also known as acupuncture therapy and blood diarrhea therapy, is a traditional external treatment method in Chinese medicine that uses sharper needles to needle certain acupoints, certain pathological reaction points, lesions or superficial surfaces on the patient’s body to release the right amount of blood for therapeutic purposes. Bloodletting therapy can be used to treat a variety of skin diseases, such as acne, rosacea, neurodermatitis, eczema, insect bite dermatitis, psoriasis, and herpes zoster. It is effective in clearing heat and fire, nourishing blood and removing irritation, reducing swelling and pain, detoxifying and protecting the liver, and calming the liver and quenching the wind.