Thanks for posting your query.
The burning soles can be due to many possible causes like uncontrolled chronic hyperglycemia
, dry environment or deficiency of folate
and vitamin B12
to name a few.
If there is some local eruption then it may be due to local infections.
It would not affect the baby but if the problem persists then you should get reviewed by a physician.
lets hope you give birth to a healthy baby.
I hope your query has been answered.