Hi. Welcome to Healthcaremagic. I read your query. It seems that the filling that was done was deep and close to pulp. This bump on gums corelates with abscess due to tooth infection and white point is pus discharge point ( discharge may not happen on its own). Is she complaining of pain or discomfort? Make her do warm saline rinses. This will help drain pus. Syrup Tylenol can help in pain. You need to take her to dentist at the earliest. An x-ray will help in definite diagnosis. Depending on which tooth it is and status of developing corresponding permanent tooth, dentist may choose to remove it or do Root canal treatment. Give her prescribed antibiotic treatment from dentist. Maintain good oral hygiene and healthy diet. Hope the answer helps. Thank you.