Welcome to HealthcareMagic forum.
Yes , any ankle injury
with persistent pain and visible swelling could indicate an underlying soft tissue injury
to ligaments or muscles.
is unlikely with such injury and the fact that she has no limitation of movement further rules it out.
However the swelling should have reduced atleast after 2 weeks and the pain tolerable (should not require Tylenol
), hence considering her present situation it's best to consult your doctor and get her evaluated .
The doctor depending on the examination finding may order X-ray if needed and start appropriate treatment .
Hope this information is helpful to you.
Wishing her a speedy recovery.