Brief Answer:delayed hypersensitivity
HI, thanks for using healthcare magic
Allergic responses can be immediate or delayed.
The allergic response can be termed a hypersensitivity reaction, when it is delayed it is called a delayed hypersensitivity reaction.
It is different from the immediate response because it can occur 48 to 72 hours after initial exposure.
This delayed reaction would be the reason for your rash
You can continue the use of the benadryl
that you were using for your reaction.
The reaction should completely resolve within the next 2 to 3 days.
I hope this helps,feel free to ask any other questions