A wound that heals superficially but is hard inside is mostly normal. When the wound healing is in the stage of tissue regeneration, scarring may occur, which may produce a harder fibrous wrapping that is hard to the touch with a striated material. As it continues to soften, the scar may gradually return to normal and the patient will generally not experience significant discomfort. If patients want to speed up the healing of the scar, they can apply local heat compresses, or apply cumene cream ointment, recombinant human epidermal growth factor gel, etc. under the guidance of the doctor according to the situation. At the same time, the patient should pay attention to eating foods with high protein and vitamin in appropriate amount to promote the absorption of nutrients in the body, which is also beneficial to the recovery of the scar area. However, if the hard part inside gradually increases in size or does not subside for a long time after the wound heals with time, which affects the appearance, it can also be removed by laser or surgery in time at plastic surgery department or surgery department. In addition, some people may not belong to the above situation, may be due to subcutaneous pus, part of the tissue necrosis, need to further determine and treatment. 1, subcutaneous pus: in the process of recovery, some patients may occur infection, which can appear subcutaneous abscess, because the surface has healed, pus accumulation in the subcutaneous and can not be discharged, so the internal pressure, touching the texture It is hard to the touch. At this time, the patient may also have redness and swelling around the wound, fever, etc., and a certain painful feeling when touched. This situation should be promptly to the hospital for medical treatment, if necessary, may need to cut open the wound to drain the pus, debridement treatment, and the use of anti-infective and anti-inflammatory pain medication to avoid further deterioration; 2, part of the tissue necrosis: this condition usually occurs in deeper wounds, larger area of the population, is not common. This part of muscle tissue necrosis may occur during the healing process, this part of the muscle is not felt when touched, hard and inelastic, i.e. the wound surface is healed but hard inside, and there may be muscle atrophy. You can go to the hospital to have the doctor clarify the necrosis of the tissue by means of MRI or ultrasound examination, and consider whether surgical treatment is needed. If it affects daily activities or has a large scope, surgical treatment to remove the necrotic tissue may be required. When the above situation is found, it should be actively observed, and if other accompanying symptoms have occurred, prompt medical attention should be sought to avoid the muscles and joints or deeper tissues being affected, leading to the occurrence of serious systemic symptoms. It is advisable to eat more food rich in high quality protein and high vitamin in daily life, such as milk, eggs, soy products, fresh fruits and vegetables, etc., to promote the internal recovery of the wound. Avoid eating spicy and other stimulating foods such as wine, chili, onion, ginger, garlic, etc., as well as foods that can easily cause allergies, such as seafood, to avoid wound infection and allergy, which can lead to aggravation of the condition and is not conducive to the internal recovery of the wound.