A 2010 review study found that red light therapy effectively treats painful tendon injuries and inflammation. Considering that pain is one of the most common reasons for missing work and visiting the doctor, red light therapy is a natural treatment worth pursuing. Skin Health and Appearance Another popular use for red light therapy -- and an area that it excels in -- is improving the health and appearance of the skin. It boosts blood flow, bringing oxygen and nutrients to the skin cells to encourage healing and reduce inflammation. It also increases the production by stimulating cells called fibroblasts. It's found predominantly in connective tissue and acts as the "glue" that holds everything together and gives the skin strength and elasticity. Unfortunately, poor nutrition and lifestyle and ageing all decrease our production, and the appearance of our skin suffers. By encouraging production, red light therapy firms up skin, reduces fine lines, wrinkles and sagging and generally improves your appearance.