How can i prevent sweating too much during summer?it happens even after bath and i sweat too much in my armpits, on chest and my back!

No easy answer: Talk it over in more detail with your physician. There are a few medical causes for excessive perspiration that should be excluded. However, assuming there is no underlying cause, there really is no simple solution. Some people just sweat more than others and there isn't any great answer above or beyond common sense solutions. I hope this helps.