Thanks for the query,
You might be suffering from herpes
Your description of water filled tiny lesions exactly matches it.
It is a viral infection.
Usually it is precipitated by stress
Please apply some anti viral cream like acyclovir
You will get relief.
Please meet a dermatologist
for final diagnosis and treatment
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.