Hello,
If the rash is limited to your hands and feet then pompholyx is an important possibility. Pompholyx primarily involves the hands and fingers and then may involve the feet. The first stage is acute and presents as itchy blisters on the hands, fingers and toes. Then the chronic stage shows more peeling, cracking, or crusting. Then the skin heals up, or the blistering may start again. The exact cause is not known and excessive sweating can be one of the reasons.
If the symptoms persist then the fluid should be sent for microscopic examination.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
I have had similar outbreaks over the years, but limited to hands and feet. I've been told it's everything from chemical burns (the skin eventually flakes and peels) to contact allergies. Just today a coworker looked at my hands and said she has had the same problem - it's called dyshidrosis. Check out Wikipedia, I found it helpful. Also mayoclinic.com.
It is not contagious. The fluid is just serum (the 'watery' component of blood). As with my coworker, I find water exacerbates the problem. Her doctor had her shower with gloves on for over two weeks to protect the skin. A good ointment/moisturizer is a must too. Something that allows your skin to still breathe. Hope this helps.