Welcome and thanks for posting your query to HCM.
After reading your query I reassure you fully that your rash
is not related to herpes
or any viral infection. In herpes or viral infection there appears frank fluid filled blisters
which are so painful that the patient can not ignore and meets the doctor at the earliest.
You have this rash since Tuesday so had it been herpes then just had appeared with blisters. The only possibility appears to be of simple bruising due accidental trauma. It may take next couple of day to get settled and may een get darkened. SO do not worry about the same. You either avoid your Therapeutic Massage
program for few days or if at all you go then avoid massage over this area.
Get well soon.
With good health wishes
Dr. Sanjay Kumar Kanodia