Hard lumps in the chin after hitting the hyaluronic acid probably need about 1~2 weeks to soften. First of all, hyaluronic acid must be in the regular medical plastic surgery hospital to play, general chin after playing hyaluronic acid 0 ~ 3 days after surgery, the injection site will appear swelling, redness, hardness and mild bruising, 4 ~ 7 days will enter the rapid swelling period, hard lumps of swelling faster, if the patient’s skin tissues recover faster, about a week or so time will become soft. After the chin after hyaluronic acid surgery must pay attention to, avoid contact with the injection area within 12 hours after the injection, within a week of smoking, alcohol and spicy stimulating food, within a short period of time to avoid the injection area and around the application of topical medications and cosmetics, but also need to pay attention to, the injection site do not get wet too soon, so as to avoid secondary infection.