1. Bone protrusions of upper and lower limbs
On the outer side of the knee joint, there is a bulge at the upper end of the lower leg, called the capillary fibula. There is the common peroneal nerve around it, which is very superficial. If it is injured, it will cause foot drop, toe inability to extend back, foot sensory disturbance, etc. The membrane gun cannot touch around the fibular head. The front of the knee joint is a protrusion of the tibial tubercle, which cannot be hit with a fascia gun.
The inner side of the elbow joint is where the ulnar nerve groove passes, and sometimes the forearm will be numb when touched here. Because the ulnar nerve is very superficial here, it cannot be touched with a fascia gun. The anterolateral side of the shoulder joint, anatomically called the greater tubercle, is where the rotator cuff attaches, and it cannot be touched with a fascia gun.
2. Around the neck
There are many nerves and blood vessels passing through the side and front of the neck, and there are nerve reflex receptors, which are very sensitive and fragile. If the fascia gun is used in these places, the risk is very high.
3. Around the clavicle, underarm, upper arm and popliteal
These areas are full of important nerves and blood vessels such as the brachial plexus and its branches, supraclavicular artery, and brachial artery. The popliteal fossa refers to the fossa behind the knee joint. There are popliteal arteries, nerves, etc., and the location is relatively superficial. The consequences of the injury are very serious, so these positions cannot be directly hit with a fascia gun.