Thank you for the information,
The swelling of the thumb & the 2 fingers can be due to an infection or collection of blood or hematoma. .
The numbness of the foot & calf are related to nerve impulses .
It can be due to pinching of a nerve or its root any where in its course.
The other causes are low calcium or electrolytes, vitamins , thyroid
diseases, diabetes, or other nerve diseases.
When you have gastric bypass with loss of weight a possibility of vitamin deficiency like Vitamin B 12 is there.
This can cause the feeling of numbness.
You need to see doctor for an examination & find out the cause.
I hope this information will be helpful.
Please ask if you need any clarification.