Hello, I would like information about your dental and overall health. There may be a dental related infection responsible for a swelling even without pain as a symptom. This could be an abscess related to a tooth or surrounding bone. Are you up to date with your dental exams? Possibilities include a soft tissue cyst, hematoma, tumor or vascular abnormality. A clinical exam is advised. More details should be discussed with your doctor. Do you have a history of trauma to the roof of your mouth? Have you taken any medication such as an anti-inflammatory to reduce swelling? I do not recommend that you continue use of the needle. Thank you for your inquiry.