A tetanus shot is usually recommended for an ear injury with 3 stitches to the cartilage. An ear injury with stitches indicates a more serious injury, and it is possible to contract Clostridium tetani if it is caused by rusty knives or nails, etc., or if the wound is contaminated. Tetanus is an acute infectious, toxic disease that can cause strong and persistent muscle contractions, and even death, so it is best to inject tetanus vaccine for prevention. Daily to keep the wound clean, do a good job of disinfection, avoid contact with contaminated items, regular dressing change, can be 5 ~ 7 days later, according to the recovery of the wound to remove the stitches. Consult your physician for advice.