What is the first treatment for an ACL tear?

The anterior cruciate ligament helps control forward movement and rotation of the knee. After a tear, pain, swelling, stiffness or a feeling of giving way may affect walking. An assessment checks the knee and looks for associated meniscus, cartilage or ligament injuries.

Early physiotherapy, sometimes called prehabilitation, aims to reduce swelling, regain full comfortable movement and rebuild control of the thigh and hip. A knee brace may be useful for selected activities or instability, but it does not replace assessment.

Pause cutting, pivoting, jumping and sport until a clinician gives you a plan. Use prescribed support, ice or elevation only as directed, and keep gentle movement within a tolerable range. Physiotherapy can progress from motion and muscle activation to balance, strength and sport-specific control.

ACL reconstruction may be discussed when instability, associated injuries, activity goals or examination findings make it suitable. Rehabilitation before and after surgery remains central to restoring function.

Arrange prompt assessment after a twisting injury followed by swelling, instability or difficulty bearing weight. Seek urgent care if the knee is locked, the foot becomes numb or cold, or severe pain and swelling prevent movement.

Ask whether the tear is complete or partial, whether another structure is injured, and which movements are safe. Discuss the role of knee bracing, prehabilitation and ACL reconstruction, plus the milestones required before returning to sport.