How do I get rid of a blood blister on foot bite?

Advise you . See a podiatrist for care. Bathroom surgery often ends in infection.
Need more info. If you have a blood blister from an insect bite that is different than a blood blister from a dog bite. You need to see your pcp or podiatrist for evaluation and recommendation of treatment. Most times we leave blisters alone to heal on their own, depending on size and severity.