**Abstract**

Fu's subcutaneous needling (FSN) uses disposable FSN acupuncture needle as its tool to stimulate the subcutaneous layer by doing horizontal sweeping manipulation. Needling sites are mainly selected around or near tightened muscles which contain one or several myofascial trigger points and cause pain or other illnesses. FSN therapy is originated from classics and based on clinical practice. Out of inheritance and innovation, it is the scientific research achievement of Fu Zhonghua and his research team over 22 years of hard work. It is the original and innovative technology with independent intellectual property rights. FSN therapy is safe, nontoxic, and has no side effect. This chapter is drafted in order to facilitate clinical study and application, by which the terms and definitions, indications and contraindications, operating procedures, exceptions, and the relative handling as well as precautions are written down.

**Keywords:** Fu's subcutaneous needling (FSN), FSN therapy, tightened muscle (TM), insertion point, sweeping movement, reperfusion approach
