Analgesic Effect of Moxibustion with Different Temperature on Inflammatory and Neuropathic Pain Mice: A Comparative Study.

The aim of this study was to determine whether variation of temperature during moxibustion would generate division of analgesic effect. The moxibustion with different temperatures (37 degrees C, 42 degrees C, 47 degrees C, and 52 degrees C) was applied to ST36 acupoint for 30 minutes in chronic inflammatory or neuropathic pain mice. The analgesic effect was evaluated by thermal hyperalgesia test in chronic inflammatory pain and by mechanical allodynia in neuropathic pain, respectively. The results indicated that interventions of moxibustion with different temperature caused different analgesic effect on either chronic inflammatory induced by injection of complete Freund's adjuvant (CFA) or neuropathic pain induced by spared nerve injury (SNI). In chronic inflammatory pain, different moxibustion temperature generated different intensity of analgesic effect: the higher the better. In chronic neuropathic pain, stronger analgesic effect was found in moxibustion with temperature 47 degrees C or 52 degrees C other than 37 degrees C and 42 degrees C. However, there is no significant difference displayed between moxibustion temperatures 47 degrees C and 52 degrees C or 37 degrees C and 42 degrees C. It implies that the temperature should be taken into account for moxibustion treatment to chronic inflammatory or neuropathic pain.