Hello, I'm a surgeon. The tension of some incisions during the operation is too high. For example, some operations to remove excessive skin, large trauma, abdominal surgery and so on. The tension of the incision is very high. Skin suture is to draw both sides of the skin. Then suture intermittently. Tie the knot again. But the tension of the incision is greater. Incisions should be added, subtracted and stitched. Prevent the tension on both sides of the incision from being too large, which will cause the incision to crack after stitches are removed. Or the tension is too high, and the thread is broken before the suture is taken out, which hurts badly. Ordinary skin intermittent suture is line 4. Needle spacing is generally 1cm (not ordinary needle spacing. But the distance from the needle hole where the suture passes through the skin to the incision line). The margin of 1cm is larger. When sewing, a sterile rubber tube should be put on the suture line. Prevent the slit from cutting the tissue. Tension reduction suture, not full suture. Only 2-3 stitches can be properly added. Because the healed pinhole has stitches, it is much more ugly than ordinary intermittent stitches. Not to mention much uglier than beautiful intradermal suture. Therefore, the clinical practice is to suture intermittently with less needles. Add 2-3 stitches to reduce suture tension and prevent tissue cutting or incision cracking. Removing stitches is to remove the intermittent stitches after 7 days. Wait another 7 days until the skin is completely healed. Then remove the tension-reducing suture to prevent the tensile strength of the suture from being insufficient after 7 days. Causing the incision to crack