There a variety of other techniques utilized by the doctors to provide care to their patients. These techniques are used to complement the main techniques performed by the chiropractors. Electrical stimulation is a method to assist with pain control and relaxation of spastic muscles. Another modality is cervical decompression therapy, also called traction, which helps to provide relief of neck pain. It gently stretches the spine, relieving pressure off of the discs, joints and surrounding muscles. The treatment can help alleviate symptoms originating from herniated discs, nerve pain down the shoulder or arm, or degenerative disc disease. Also, the doctors may use a cold laser. This uses light energy to stimulate tissue healing, increased circulation, reduce inflammation, and decrease pain. It is beneficial is acute injury setting to control inflammation, such as an acute ankle sprain.