Botox for Chronic Pelvic Pain

Inclusion Criteria: 1. Females between 18 and 75 years of age 2. Clinical diagnosis of chronic pelvic pain 3. Complaints of pain, pressure, or discomfort in the bladder and/or pelvic area for the past 6 months or more, associated with lower urinary tract symptoms (such as frequency of urination), in the absence of other explanation of the symptoms (e.g., UTI) \* 4. Myofascial pain diagnosed with palpable bands or nodules of contracted muscle fibers 5. Pelvic muscle tenderness by assessment of pelvic floor muscles on digital pelvic examination 6. No botulinum neurotoxin pelvic floor muscle injection treatment within 6 months prior to recruitment 7. Able to provide informed consent Exclusion Criteria: 1. Males 2. Women \< 18 and \> 76 years of age 3. History of pelvic malignancy and sexual transmitted diseases that is currently not in remission 4. Bleeding disorder such as coagulopathy 5. Hypersensitivity to botulinum neurotoxin 6. Received botulinum neurotoxin pelvic floor muscle injection within 6 months prior to recruitment 7. History of neurological disorders, such as spinal cord injury, multiple sclerosis, amyotrophic lateral sclerosis or myasthenia gravis 8. Pregnancy, breast feeding or planning to get pregnant within one year after the last botulinum neurotoxin injection.