blister on top of left foot and between toes of a 96 year old lady who had never had anything like this before

My mother is a 96 year old lady. For the last three months she had had blisters intermittenly appearing on her feet between her toes, a thing she had never had before/  The are full of fluid and now spreading over the top of her left foot

[Bhupinder Kaur, MD]

Hello,
There are many possibilities for such blister on dorsum of foot. These include Porphyria cutanea tarda,Pseudo or Drug induced PCT,Epidermolysis bullosa aquisita,Phytophoto dermatitis,Bullosa diabeticorum and some benign lesions. To confirm the diagnosis I suggest you to get an evaluation done from a dermatologist.

I hope it helps. Take care and regards.