Walking after an anterior and posterior horn tear of the medial meniscus is disruptive and can aggravate the condition. An anterior and posterior horn tear of the medial meniscus is a third-degree meniscus injury, which is a more serious condition. When walking, the pressure on the meniscus increases, which will exacerbate the degree of the tear, thus aggravating symptoms such as pain, swelling, and limited movement of the knee joint. In this case, you should reduce walking, rest and brake, and immobilize the knee with a cast or brace. If not treated promptly, it may cause secondary cartilage damage, which is not conducive to subsequent treatment and rehabilitation. If there is a tear of the anterior and posterior corners of the medial meniscus, the knee should be braked and walking should be reduced. It is recommended to consult a doctor as soon as possible and follow the doctor’s instructions for standardized treatment, so as to avoid aggravating the condition and causing irreversible damage.