Women are more susceptible to sacroiliac joint pain than men because the physiological changes associated with childbearing (e.g. pregnancy associated with weight gain, exaggerated lumber lordosis, hormone-induced ligamentous laxity and the mechanical trauma associated with childbirth) may result in sacroiliac joint pathology .~Low level laser is effective for treatment of various musculoskeletal pain disorders. It releases local neurotransmitters such as serotonin and endorphins. Additionally, the analgesic effect of LLLT is thought to be related to its anti-inflammatory action. Laser irradiations also relieve pain by alleviating and removing swelling and by increasing oxygenation of the tissues, thus results in reduction of the pain .
the purpose of the study will be to to examine the effect of low level laser therapy on pain and function disability in postnatal women with sacroiliac joint pain.