We understand your mothers condition and your concern toward her. But you see infecti8n of the tongue has many reasons. We need to know whether it exactly infection or stomatitis because of the nutrient deficiency. Whatever it is it totally depemds upon doctors treatmemt and nourishment of your mother. Since your mother is unable to have anything apart from solid food. She need to be on liquid diet and that shiuod provude all the nutrition she needs, just consult a dietician for yournmothers heop and prooer nourishment. And have follow uo with the same doctor for improvement. Thank you