The 7-year-old child’s gums swollen a lump of flesh may be gingivitis, apical periodontitis and other diseases, need to take medication, surgical treatment for the cause. 1. Gingivitis: a 7-year-old child’s gums are swollen with a lump of flesh may be caused by gingivitis. Children with gingivitis can be scaled or rinsed locally under the guidance of a doctor. 2. Periapical periodontitis: 7-year-old child’s gums swollen a lump of flesh is also considered to be due to periapical periodontitis. The child can take oral antibiotics or pain medication under the guidance of the doctor, such as metronidazole, ibuprofen and so on. And need to promptly seek medical treatment to take root canal surgery to eliminate inflammation. There are many reasons why a 7-year-old child’s gums are swollen with a lump of flesh, parents need to bring their children to the hospital to find out the cause of the disease.