Lockjaw, medically known as trismus, is a condition characterized by the reduced ability to open the mouth fully. This can result from various causes such as infections like tetanus, dental procedures, trauma, or temporomandibular joint disorders. Recognizing early symptoms—including difficulty opening the mouth, jaw stiffness, and pain—is crucial for timely diagnosis and treatment. Treatment for lockjaw typically depends on the underlying cause. It may include medications such as muscle relaxants, anti-inflammatory drugs, or antibiotics if infection is present. Physical therapy and jaw exercises are commonly recommended to improve mobility and reduce muscle tightness. In severe cases, surgical intervention might be necessary. Preventive measures focus on maintaining good oral hygiene, seeking prompt medical attention for facial injuries or infections, and following dental care instructions carefully after procedures. Understanding the link between tetanus and lockjaw underscores the importance of vaccination. By being informed about lockjaw, individuals can seek early medical advice, avoid complications, and improve recovery outcomes.