My son has a blister like fungus that keeps re-occurring on his fingers. It usually begins like a blood blister, on the palm side and between the joints of his fingers. Within a few days, it will be increasingly more blistered like, begin to swell and look like a fever blister that would appear on a person's lip. He does get the herpes type fever blisters on his lips occassionally, but can be treated with Abreva.
When he was a child, he would get this type of fungus on his fingers regularly, but it was do to him sucking on them instead of his thumb.
How do I treat this? We have used Abreva, fungus creams, anti-botic ointments and even popped the blisters to relieve the pressure. The fungus continues to grow in size, but never spreads to other parts of his finger. It stays contained to an oval shape, just increases in size and color.