It’s been half a month since the leg was bruised, and there are hard knots only on the bruised area, which may be scar tissue formed after soft tissue injury, or a bruise plaque where the subcutaneous bruise has not been fully absorbed. Treatment includes physical therapy, medication and so on. 1. Scar tissue: after leg injury, it will cause local soft tissue contusion, and the soft tissue will form scar tissue locally after healing, if there is no symptom and it does not affect the normal function, it usually does not need to be treated, and it will be absorbed by the human body slowly. 2. Bruised plaque: It can be relieved by local massage, acupuncture and other methods to relax the tendons and collaterals, activate blood circulation and remove blood stasis, and at the same time with medicines such as Yunnan Baiyao Spray to reduce swelling and relieve pain, and activate blood circulation and dissipate blood stasis. There may be other reasons for the above situation, such as localized calcified plaque (generally no treatment is needed). It is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment. The above medications should be used under the guidance of a doctor or pharmacist, avoid self-medication.