Over the past two decades, evidence has emerged to demonstrate that topical versions of NSAIDs are well absorbed through the skin and reach therapeutic levels in synovial fluid, muscle, and fascia. … For chronic conditions like osteoarthritis, the data are of fair quality and are persuasive. On balance, there’s good evidence to show that topical NSAIDs are clinically- and cost-effective for short term (< 4 weeks) use, especially when pain is localized.
The first is that inflammation-lowering NSAIDs destroy your gut lining. Check the bottle of ibuprofen or aspirin in your medicine cabinet. You’ll see it right on the label: “NSAIDs such as ibuprofen may cause ulcers, bleeding, or holes in the stomach and/or intestine.” Long-term low-dose aspirin use is particularly likely to cause ulcers and tear holes in your intestine.