Acupuncture needles are extremely fine, flexible, and are always disposed of after use. Most people feel minimal pain or discomfort as the needles are inserted; some people are not even aware that the needle has been inserted. When the needle reaches the correct stimulus point, you may feel some cramping, heaviness or tingling. This discomfort is mild and subsides momentarily. You will then be left to rest with the needles in place (approximately 30-45 minutes). It is not unusual to fall asleep during an acupuncture treatment.