Sounds like a plan to put the frozen hot pocket on it (which sounds kind of funny but I'm sure works well to cool the area). If it blisters, put some antibiotic ointment or burn/healing ointment on it if you have it.
What are oxtails?
Truth is they won't do much for you at the er.
Just keep putting frozen stuff on it :)
If it hurts & you feel like you need to go to the er go ahead .