My mother is 82, she has developed tiny bloody blisters that form and break open along the shin of her leg. They DON T ITCH or BURN. She has had other skin eruptions in the past, that have pus and itch and burn. These are totally different. Her immune system is compromised. She has acute leukemia. She has seen a dermatologist for her other skin problems. She has a cream for the other skin condition.
The blood blisters could be due to the acute leukemia. With leukemia, the platelets can get very low. The platelets function in blood clotting. If they are too low, bleeding and bruising can result. Her hematologist should be informed of this development. I don't know of any specific cream or topical medicine that will help this, but perhaps her doctor might. If her platelets are very low, she might need to get transfusions of platelets. Talk to her hematologist about her condition very soon. Hope this helps.