Soft Tissue Injury Treatment Soft tissue injuries in the mouth can happen unexpectedly due to accidents, sports injuries, falls, accidental biting, or dental trauma. These injuries may affect the gums, tongue, lips, or inside of the cheeks and can cause bleeding, swelling, and discomfort. While minor injuries may heal naturally, some require professional evaluation and soft tissue injury treatment. McClane Dentistry in Stuart, FL can evaluate oral injuries and help determine the appropriate dental care.