After cesarean section, there is a hard lump on the inside of the wound, which may be caused by tight suture knot, infection and pus, scar hyperplasia, and need to be treated with anti-infection, laser and other treatments. 1. Suture knot is too tight: some patients because the doctor in the process of suturing, suture knot pulled too tight so that the fat gathered into a ball and lead to, without special treatment, after a period of time can disappear naturally. 2. Infection and pus: After the operation, the wound is not properly cared for, which causes infection and pus and thus hard lumps, accompanied by redness, swelling, pain, fever and other symptoms, need to use ampicillin, amoxicillin, meloxicillin and other antibiotics for treatment, and need to be incised and drained if necessary. 3. Keloid hyperplasia: scarring people in the wound healing process, there will be scar hyperplasia and thus produce hard lumps, need to use ionization, fractional laser and other means of treatment, but also can be carried out for scar excision for cosmetic suture, followed by laser treatment. After cesarean section wound feel inside a hard lump need to be combined with the cause, under the guidance of the doctor for treatment, remember not to abuse the drug.