French researchers looked to determine whether reducing pain shortly after surgery would result in reduced chronic pain development later on. Of the 230 patients examined, 33 percent treated with a local anesthetic had their acute post-surgical pain reduced by half. However, even patients with lowered acute pain did not experience a decrease in the incidence of chronic pain at three months.
The second studied labor pain in mice with the topical application of capsaicin. Researchers found the analgesia statistically decreased pain for various stages of labor. Thus, capsaicin may be used as a minimally invasive, natural adjunct to induction of labor.
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