Knee warmth is a noticeable increase in temperature around the knee compared with the surrounding skin or the other knee. It can be a clinical sign that a knee joint or nearby tissues are inflamed, irritated, or less commonly infected. It is also used as a general term for therapeutic heat applications intended to soothe pain and stiffness. Knee warmth is commonly discussed in orthopedic clinics, sports medicine, physical therapy, and home symptom monitoring.

Recurvatum means a joint position that bends backward past its usual straight alignment. In the knee, Recurvatum commonly refers to hyperextension, where the knee goes “past straight.” It is used in orthopedics, sports medicine, and physical therapy to describe alignment and gait patterns. Clinicians discuss Recurvatum when evaluating pain, instability, muscle control, and joint mechanics.

Valgus knee describes a knee alignment where the knee angles inward relative to the hip and ankle. In everyday language, it is often called “knock-knee.” It is commonly used in orthopedics, sports medicine, and physical therapy to describe limb alignment and loading. Clinicians use the term to communicate findings, guide diagnosis, and plan management.

Varus knee describes a knee alignment where the lower leg angles inward relative to the thigh, creating a “bow-legged” appearance. It is an orthopedic term used to describe how the femur (thigh bone) and tibia (shin bone) line up at the knee. It is commonly discussed when evaluating knee pain, arthritis, ligament injuries, and walking mechanics. Clinicians also use it when planning bracing, rehabilitation, or surgery that depends on leg alignment.

Knee deformity means the knee is not aligned or shaped in the usual way. It can involve the angle of the thighbone and shinbone, the kneecap’s tracking, or the knee’s ability to fully straighten or bend. The term is used in orthopedic exams, physical therapy assessments, imaging reports, and surgical planning. It describes a structural or positional pattern, not a diagnosis by itself.

Limp is a change in the normal walking pattern (gait) that reduces smooth, symmetrical steps. It is commonly described as “favoring” one leg, taking shorter steps, or avoiding weight on a painful side. In orthopedics and physical therapy, Limp is treated as a clinical sign, not a diagnosis by itself. It is discussed in knee clinics, sports medicine, urgent care, and rehabilitation settings.

Antalgic gait is a walking pattern people adopt to reduce pain. It commonly looks like a “limp” with less time spent standing on the painful leg. It is used as a descriptive term in orthopedics, sports medicine, and physical therapy. It can be a clue that pain is affecting the knee, hip, ankle, foot, or even the low back.

Extension lag is a clinical finding where the knee cannot straighten fully by muscle effort. The key feature is that full straightening may be possible when someone else moves the knee for you. It is commonly discussed in knee exams, physical therapy notes, and post-surgical follow-ups. It helps describe how well the knee’s “extensor mechanism” is working.

Flexion contracture is a condition where a joint cannot fully straighten (extend) and stays partly bent (flexed). It most commonly affects the knee, but it can occur in other joints. The term is used in orthopedics and physical therapy to describe a measurable loss of extension. It helps clinicians document function, guide treatment options, and track recovery over time.

Decreased knee ROM means the knee does not bend or straighten as far as expected. ROM stands for “range of motion,” which is a basic way clinicians describe joint movement. It is commonly documented in orthopedics, sports medicine, and physical therapy exams. It can be a symptom, a functional limitation, or an exam finding after injury or surgery.