what causes one of your legs to ache
There are many diseases that cause leg pain, such as diabetes, which if left untreated can cause damage to the nerves in the legs. Blood circulation disorders can also cause aching legs. Chronic diseases such as arthritis and cancer also tend to cause pain and soreness of the joints and muscles.
1 If you experience leg cramps you will feel the pain of aching legs for at least one or two days. 2  Standing or sitting with the wrong posture can lead to additional strain on your lower back and limbs causing achy legs. 3  Medications.  Sometimes medications have leg pain side effects.