1 Unmounted mint (UM) â the stamp is unused and appears never to have been mounted. 2  Mint never hinged (MNH) â the same as unmounted mint but with an assertion that the stamp is not a formerly mounted stamp that has been tampered with to remove traces of mounting.
vermilion zone, n the external darkish area of the upper and lower lips, extending from the junction of the lips, with the surrounding facial skin on the exterior to the labial mucosa within the oral cavity.
Canker sores. One of the main causes of bumps around lips is canker sores. These are shallow, painful red or white tiny lip lumps that occur on the inside mouth linings. You might get them on the inside of your lips or the insides of your cheeks.