Muscle pain, also known as myalgia, can be caused by several factors. The most common causes of muscle pain include overuse, injury, trauma, stress, and tension. However, rarer pathologies such as fibromyalgia, polymyositis, polymyalgia rheumatica, dehydration, mineral deficiency, viral or bacterial infections, some medications, and certain chemotherapies or radiation therapies may also cause muscle pain. It is important to note that muscle pain can also occur without a known cause, in which case it’s called idiopathic muscle pain. If you suffer from muscle pain, it’s best to consult a doctor to determine the underlying cause and find an appropriate treatment.