Overexertion of the muscles is what usually causes muscle pains. This happens when unexpected stress is endured causing the muscles to damage a few cells. This results to inflexibility and pain that can usually be observed a few minutes after the activity. One of the best ways to relieve muscle pain is through warm baths through your hot tub heaters. Heat has the ability to open blood vessels, thus improving the blood circulation. Anxiety also contributes to muscle pain. Warm baths are also popular to relax both the mind and the body, which can be used to free you from strain and anxiety. Most experts recommend warm baths to treat muscle pains.