How long it takes for a wound to heal is not generalizable and depends on the condition of the wound exudate. How long does it take for a wound to heal depends on the cause of the exudate, whether the wound is infected, the amount of exudate, and whether the treatment is timely. For ordinary superficial abrasions, the acute exudation period is 48 hours after the injury, and the wound can be completely healed in about 7-10 days. For severe open wounds, if there is no infection, the exudate will not continue after 24 hours of suturing, and if infection is present, the exudate can last about 1-2 weeks. If a wound foreign body is present, the wound exudate will usually stop in about 5-7 days if thorough debridement is performed in a timely manner, but if the wound foreign body is not removed in a timely manner, the exudate will last longer. After the wound exudate appears, it is recommended to go to the regular hospital general surgery department for a clear diagnosis by the doctor, and at the same time take targeted treatment measures, and saline gauze can be applied externally when there is a lot of exudate.