Hello, A mucocele is a common condition experienced in the mouth. This can be due to trauma and pooling of liquid causing a blister like appearance often due to damage to a salivary duct. If persistent with noticeable swelling, you may need to see an oral surgeon for removal. Other types of growths are possible. Please make sure to monitor your condition and describe your symptoms to your dentist at your routine dental visit. Try warm salt water rinses, avoid all irritants and do not attempt to pop the area. Your description does not sound like you need urgent attention at this time. Thank you for your inquiry. I hope the area will continue to improve and resolve on its own.