Bubble Blister- the hotspot has progressed, and a fluid filled bubble on the skin that most will recognise as a blister is now visible.
If the roof is still on then treat it in a similar way to a hotspot by applying a sterile island dressing. If the blister bursts (pops) when the dressing is on, then you know the dressing is already sterile and will prevent an infection from getting into the open sore.
If you decide to pop the blister then follow the instructions on “How to Pop Your Blister” and treat it as a Roof Torn Blister.
Use padding on the area and Engo patch inside the shoe.