The Efficacy of Cryotherapy in Pregnancy Related Pelvic Girdle Pain

Inclusion Criteria: * English speaking pregnant women presenting in their second or third trimester with acute posterior PGP (occurring within the last 3 months). Trimester will be determined from the date of last menses or ultrasound date. * Current VAS pain score between 2-4 * Written informed consent Exclusion Criteria: * Non-English speaking pregnant women \<18 or \>50 years old * Women presenting with low back pain, or posterior pelvic pain in the first trimester (\<13 weeks gestation). * Women with acute low back pain in 2nd and 3rd trimester * Women with anterior pelvic girdle pain (pubic symphysis) alone * Chronic low back pain (current or past history, defined as \> 6 weeks of low back pain) * History of lumbar or pelvic fracture; degenerative disc disease; neoplasm; inflammatory disease; active urogenital infection or active gastrointestinal illness; previous surgery of the lumbar spine, pelvic girdle, hip joint or femur * History or signs of radiculopathy or other systemic neurologic disease * Narcotic medication use