I have been getting these Blisters on my hands now for about a year. Same as you they have clear liquid in them. I went to a Dermatologist and they did a Biopsy on one of the Blisters, and Blood Test, Urine Test and the results came back for a condition called (PCT) Porphyria Cutanea Tarda. It's a very old and rare disease. The only way I can get my Blisters to go away or keep the breakouts of blisters on my hands to a minimum is to have my Blood Drained about every 6-8 weeks. They drain what looks like almost a full IV Bag you might see in the hospital. But the very next day after what they call "Blood Letting" my hands do take on a whole different look and blisters do go away. Google - Porphyria Cutanea Tarda there are many websites that talk about it.
I get it all the time. It is caused from stress and some doctors relate it to Gout. I sometimes have to get a shot of steroid to help with the inflamation. It's a bad deal and extremely painful.
Jeanne - Fort Worth, TX