Eating soy sauce will not scar traumatized skin. Skin scars are formed when the skin is subjected to external injuries, such as trauma, burns, and surgical procedures, and the skin collagen overgrows, forming bright red granulation tissue that can gradually whiten and fade over time. The size of scars depends on the severity of the injury to the skin. Smaller and shallow wounds are less likely to form scars or will not form obvious scars; the larger and deeper the wound or the occurrence of infection, or the patient’s own poor nutritional status, slow recovery, keloid, etc., are more likely to lead to scar formation. Soy sauce is a common condiment in life, which is formed by the fermentation of protein raw material and starch raw material mixture. After the human body eats it for digestion and absorption, it can be decomposed by the digestive system, and the pigment components in it can be excreted out of the body with the intestine and will not enter the blood system, so it is impossible to stay in the scar area and will not lead to collagen growth of the skin. Patients with wounds should avoid eating greasy, spicy and irritating foods, including chili, onion and garlic, which are not conducive to the recovery of patients’ wounds and may irritate the wounds and produce itching, redness and swelling, and may also indirectly lead to scar formation.