“…Many previous studies of MT were conducted on chronic neck pain, comparing the effect of MT with local anesthetic lidocaine hydrochloride vs dry mesotherapy for 3 sessions showing reduction of pain on VAS scale by the 12th week of the study [47], as well as acute neck pain comparing single injection MT with local anesthetic and steroids vs oral ibuprofen, which showed more analgesic effect than ibuprofen taken orally [48]. Studies on acute back pain (using sterile water microinjections) [49], and in female patients with chronic back pain during labor [50], showed a reduction of pain using VAS score; moreover, studies for chronic spinal pain using weekly MT injection (normal saline, lidocaine 2% and lysine acetylsalicylate) for 5 weeks showed improved pain and functional outcome [51]; also, in the result of a randomized controlled study of 84 patients with low back pain study using mesotherapy of lidocaine, ketoprofen, and methylprednisolone for 5 sessions and follow-up after 6 months, they found the same effect as systemic drugs given to the control group ( ketoprofen, methylprednisolone, and esomeprazole) [11]. A recent study for knee osteoarthritis showed improvement of pain and functional outcome after 3 months' follow-up reported by Chen et al [52] comparing the effect of oral diclofenac 150 mg/day to MT (2 ml lidocaine, 40 mg piroxicam, and 100 units of calcitonin) for acute knee pain and second protocol of MT (2 ml lidocaine, 2 ml organic silica, and 100 units calcitonin) for chronic knee pain, where they concluded that MT is a safe and effective procedure to decrease pain [53].…”