Hi, Welcome to Health care magic forum.
Now you have 2 problems, one is the pricking sensations, in the abdomen, may be skin sensation.
Second is the obesity.It is a sensitive issue, because you are leading sedentary life.
You can keep weight under control, by avoiding fats,fries, junk foods, and oily foods.
Increase your activity by practicing, morning walk,
yoga, gardening, and do any work in front of you.
Minimize the sleeping time ,practice late to bed, and early to rise, avoid day time sleep.
The pricking sensation may be due to the gastric hyper acidity.
I usually prescribe to my patient with such symptoms
omeprazole,
domperidone, and
antacid gel.
Avoid taking spices, junk foods, and oily foods.
Wishing for a quick and complete recovery. Thank you.