I did my last long (18 miles) run today (I'm running in the VLM) and today I got a huge blister (at least the size of a 10p coin) on my big toe. I had one on the same toe for the first time last Sunday and I burst it (using a sterilised needle) only for it to return today. I have heard conflicting reports as whether to leave it or burst it now. I have 17 days until the VLM. Any advice would be appreciated. Thanks.