Years ago, sodium hypochlorite was used to chlorinate pools. It is basic, pH greater than 7. And I think ordinary hydrochloric acid was used to drop the pH back to 7. I don't know if these are still used. Sodium Hypochlorite ([math]NaClO[/math]) was used to chlorinate pools. If you want to lower the pH, try adding HCl.
Because most episodes of back pain have inflammation as a contributing factor, anti-inflammatory medication such as non-steroidal anti-inflammatory drugs (NSAIDs) is often an effective pain medication treatment option.
NSAIDs -- nonsteroidal anti-inflammatory drugs -- are a type of pain reliever. At prescription doses, these drugs also reduce inflammation. Inflammation is the body's response to irritation or injury and is characterized by redness, warmth, swelling, and pain. NSAIDs are used to treat a variety of conditions that cause pain and inflammation, including arthritis and tendinitis.