Since when is this? Do you have any swelling or redness around the area? Are the movements of ankle painful? Does the walking increases the problem? Does this sensations goes away when you lie down? Are you diabetic? What are the medications you are taking?
This stinging pain is likely to be because of the pinched nerves in the back. This can be because of the;
1) Degenerative disc disease
2) Bone spurs (lumbar spondylosis)
3) Combination of both the above
The sitting in plane causing cramps and increasing pain on walking is further indicative of the causative in back (spinal canal stenosis can be responsible and the reasons I mentioned do play role in this also).
The treatment is physical therapy, deep electrotherapy, back braces and anti-inflammatory analgesics.
This is unlikely to be because of your hip pain.
Read about the pinched nerves;
Please feel free for your follow up questions.