Thank you for your query.
I think you need to lose weight first by a healthy diet plan
and regular exercise .
Regarding your blisters it needs physical examination by a dermatologist
to find the exact nature of blisters . It can be a mimic of some systemic disease also. Till then you can apply some moisturing lotion over it .
Hope you are satisfied with the answer.
If you have any further queries feel free to ask.
Wish you good health.