Welcome and thanks for posting your query to HCM.
It appears from your query that your mother is suffering from the condition medically called as "bromhidrosis".
Our body contains innumerable bacterias allover the body known as "normal flora". On the skin especially these bacterias breakdown the compounds present in the sweat. Because of these bacterias a typical body odor
is produced in everybody.
Now in certain persons the eating habit and diet plays a vital role in body odor. If any body is eating lot of garlic, onions or related food then it is quite common that the chemicals in these are secreted in sweat. So there is different pungent smell of the sweat coming out of pores.
For the betterment, stop all kinds of food enumerated above or have least of these kind of food. Maintain good body hygiene by bathing two times. Antiperspirant powders can be used frequently. Stay away from hot and humid climate. wear cotton clothes changed two times daily.
Hope these informations will help.
"With good health wishes"
Dr Sanjay Kumar Kanodia