According to research and clinical practice, neck red and blue light therapy devices have been shown to be effective in relieving neck pain and improving neck muscle tension. Red light improves blood circulation and increases the supply of oxygen and nutrients, helping to reduce inflammation and promote tissue repair. Blue light, on the other hand, has antibacterial and anti-inflammatory properties that can reduce pain and inflammatory reactions caused by bacterial infections. These therapeutic devices are usually non-invasive and convenient for patients to use at home. Therefore red and blue light therapy devices for neck are useful.