Does my burn require medical care if blistered?

Burn degrees: Likely a second degree burn if clear blisters. Usually will heal in 1 week. Apply some antibiotic ointment. Now, if the burn is extensive or shows signs of infection including redness, pus, etc... Please see your physician.

Yes : It depends on the location and size. If it is a large blister or covering a joint - you might need to seek medical care. Small blisters should be kept intact.