Stiff achy ankles, stiff wrist, lower back pain, neuro says it's not neurological. Everything hurts?

Fibromyalgia. fibromyalgia is a major possibility. There are several effective therapies available. See a rheumatologist. .
Ligaments ? . 25y fem. w. "stiff ankles/wrists & low back pain" + "pain all over" ruled out as to neurologic disorder should see Rheumatologist. If no distinct findings consider fibromyalgia. Etiologic factors might be obesity, childbirth, past mechanical low back/pelvic injuries or history of chronic illness with prolonged sedentariness & loss of soft tissue mass/tone. .