Your practitioner will choose the lengths of the needles, based on the depth of the trigger point they are targeting. They will typically use three to five needles per treatment.
Needles are single use. Each needle comes in a guide tube within a sterile blister pack. They will remove the needle in its tube from the pack, place the point end of the tube against the skin, and tap the head of the needle to insert it. Then they will lift the tube away and dispose of it, leaving the needle in the skin.
When the needle is inserted, patients will usually feel a small pinch, followed by a dull ache around the needle. The ache is caused by the muscular contraction at the trigger point. As the contraction subsides, so does the ache. The practitioner may choose to restimulate the area by gently twiddling the needle, which can reinitiate the ache. At the end of the treatment, the needles are removed, which is painless.
The thought of needles can make some individuals nervous. However, considering three acupuncture needles can fit in the hole of a standard injection needle, many patients previously nervous of acupuncture find it far less painful than they might have anticipated.