My father is almost 88 yrs old. He was diagnosed with ahlzeimers over a year ago. Has two lesions on both feet that have been treated to no avail. Dr has told me that he is in the end of life stage. Spiking fevor, white nailbed, on oxygen, and infection on feet may be spreading and be the cause, as he can not fight the infection. Has Hospice. What do you think?