Symptoms associated with hematoma caused by radial artery injury successfully treated with jidabokuippo Dear Editor Jidabokuippo (JDI) is a herbal mixture used in Japan to alleviate contusion-induced swelling and pain caused by bruises and sprains. It has also been applied to various traumas and cellulitis [1]. There have been a few reports of JDI being applied for bleeding and pain after venipuncture; however, there are few reports on the symptoms after arterial puncture [2,3].We encountered a case in which JDI was useful for subcutaneous hematoma, swelling, and pain due to catheterization-induced radial artery injury. A 59-yearold man with a history of hypertension, acute myocardial infarction, and chronic kidney disease, experienced chest tightness one week before admission. As the patient's chest tightness increased, he was admitted for suspected exertional angina pectoris and underwent coronary angiography. A percutaneous coronary intervention (PCI) sheath was inserted through the left radial artery. The patient was administered 200 mg of oral aspirin and 12,000 units of intravenous heparin during