Is foul body odor a legitimate Shari excuse for severing ties of kinship, in order to avoid harm from people's comments, and to avert harm from them?

You can eliminate this odor through continuous cleanliness and by using strong perfumes if you are not passing by men who would detect your scent. Medications specifically for this condition can also be used. If none of these measures are effective, then there is no sin upon you for refraining from visiting them, in order to avert harm.