Swelling at the floor of mouth can be mucoceal.... can be surgically treated by laser or by conventional surgical ranula is a type of mucocele found on the floor of the mouth. Ranulas present as a swelling of connective tissue consisting of collected mucin from a ruptured salivary gland caused by local trauma. If small and asymptomatic further treatment may not be needed, otherwise minor oral surgery may be indicated. Ranula Ranula human 09.jpg