After you take a shower and you apply the alum, you can make a diy deodorant at home in a bottle and apply it. There is some strong oils are the herbs that are used for this issue. Herbs like celery, parsley, lavender, have got some good smells. You can make use of these and lessen your odor. You can either make a tea and you can use it as a wash, you can add these oils in water-based bottles and spray them over your body.
Use the right usage of clothes
When in summer is you are going to wear stuff like nylon or jersey it is surely going to stink. Sure so make sure that you use light clothing like net or 100% cotton. At least in summers do avoid these which are surely going to create an issue for you rather prefer lighter clothes through which the sweat is evaporated easily.