Thank you for the information.
Based on your description, you have just developed blisters which is quite common after coming in contact with blister beetles. In most cases, this is not considered lethal to human and thus no specific treatment is needed. However, there are several species of blister beetles, and may have different effects on individuals. As far as blisters are concerned, usually first aid is enough and blisters tends to subside on its own. Thus, it is recommended not to burst those blisters, as it poses the risk of infection. In the meantime you can keep eye on any other symptoms of severe reaction that may require urgent medical care, but the chances of those kind of reaction is slim, but must be observed.
Please let me know if you have any other question.