Because I am too fat and have thick legs, I always rub my thigh root when I walk in hot summer, and then I am red, painful and broken, and I will be stung when I sweat.
In the face of your present situation, you must first solve the problem of mutual friction and pain between your thighs. First go to the drugstore to buy some ointment to rub, and then wear a pair of soft, close-fitting and thigh-high bodybuilding cotton shorts to isolate skin friction. Third, with your obesity symptoms, you have to take medicine to lose weight a little first, and only in this way can you return to normal walking. Finally, what you have to do is to stick to losing weight. Come on!