Is it permissible, in Sharia, to remove the niqab due to health harm, represented by shortness of breath and problems with the nose and sinuses, and is she sinful for removing it because of that?

A woman covering her face is obligatory, and it is not permissible for her to deviate from this principle except out of necessity or need. It is essential to verify that the harm of wearing the niqab is real and religiously authenticated, and to ascertain the extent of the need for work. If the woman is provided for, it is not permissible to compromise her religion. However, if harm is proven and there is a necessity or need for work, then it is permissible to go out to the extent of that need.