The more common name for diabetic amyotrophy is diabetic neuropathy. It is a condition caused by advanced diabetes mellitus which affects the nerves in the legs, feet, hips, and buttocks. Symptoms include a wasting of the muscles of the legs as well as weakness of the leg muscles and severe, chronic pain in the buttocks, legs, and feet. Treatment includes monitoring blood glucose and keeping blood sugars well controlled as well as physical therapy and rest.
Sacroiliitis is an inflammation of one or both of the sacroiliac joints, the spot where the lower spine connects to the pelvis. Sacroiliitis can cause pain in the buttocks, lower back, and may even extend down one or both legs. The pain can worsen with prolonged standing or climbing stairs. Sacroiliitis can be caused by arthritis, injury, pregnancy, or infection.
A sedentary lifestyle can lead to having weak and tight hip flexors as they are always in the shortened position. Tight hip flexors can lead to a limited range of motion, poor posture, lower back and hip pain, and even injuries. These muscles need to get a workout when you are standing and doing movements such as raising your leg to climb stairs, run, or ride a bicycle.