In self-defense or fighting, the key to quickly subduing an opponent lies in effective strikes or control on the weakest parts of the human body. The following are the main target parts and corresponding physiological principles and suggestions for action： --- ###**1. Head and face** 1. **Eyes** -**Principle**: The eyeballs are extremely sensitive, and slight irritation can cause temporary blindness or severe pain. -**Action**: Poke or scratch with your fingertips to force your opponent to close your eyes/retreat. -**Note **: Avoid excessive injury (legal risk). 2. **Bridge of nose/wing of nose** -**Principle**: The nasal bones are fragile, and blows can easily cause severe pain, tears or nosebleeds. -**Action**: Push the palm root upward or elbow. 3. **Temples** -**Principle**: The skull is weak, and a heavy blow may cause fainting or concussion. -**Action**: Side punches or elbow strikes (need to be used with caution). 4. **Lower jaw (chin)** -**Principle**: Hitting can vibrate the cerebellum, causing a brief imbalance (KO effect). -**Action**: uppercut or swing. --- ###**2. Neck and throat** 1. **Adam's apple (more prominent in men)** -**Principle**: Pressure on the trachea can cause suffocation and severe cough. -**Action**: Horizontal slash with a hand knife or thumb press (use with caution in non-fatal situations). 2. **Carotid side (carotid artery and sinus)** -**Principle**: Compression can trigger a sudden drop in blood pressure and cause syncope. -**Action**: Hand knife or forearm pressure (need to let go quickly). --- ###**Three, the key points of the torso** 1. **Heart socket (solar plexus)** -**Principle**: A heavy blow causes short-term difficulty breathing and muscle spasms. -**Action**: Straight punch or knee bump. 2. **Ribs (lower side)** -**Principle**: Low-level ribs are prone to fractures, and pain restricts breathing. -**Action**: Side kick or elbow. 3. **Kidneys (both sides of the back waist)** -**Principle**: A heavy blow causes severe pain and even shock. -**Action**: Back kick or backhand punch. --- ###**Four, limb joints** 1. **Knee joint (side or popliteal fossa)** -**Principle**: A side kick can destroy the ligaments; a back kick to the popliteal fossa forces kneeling. -**Action**: Low sweep kick or kick. 2. **Ankle joint** -**Principle**: Vigorous valgus is easy to sprain ligaments. -**Action**: Stampede or horizontal kick. --- ###**5. Other strategies** -**Pulling hair/ears**: Creates pain and interferes with the opponent's balance. -**Finger anti-joint**: Breaking your fingers can force you to let go (for grasping). --- ###**Core principles** 1. **Speed>strength**: Weak parts can take effect without vigorous force. 2. **Escape priority**: Get out of the dangerous area immediately after subduing. 3. **Law and ethics**: Use deadly means only when life is threatened. **Reminder**: Daily it is recommended to learn Brazilian jiu-jitsu (joint control) or boxing (precision strikes) to improve actual combat skills, but always give priority to non-violent conflict resolution.