Hi... I Had Cryotherapy On A Dermatofibroma On My Inner

Hi... I had cryotherapy on a dermatofibroma on my inner thigh 4 days ago. It originally waa the size of my thumb nail. The doctor applied liquid nitrogen for about 1 minute. It formed a massive blister about 6 times the original size with 12 hrs which the doctor emptied. It has now popped open and so I removed dead skin. It cintinues to weep constantly and is very red and itchy. I jave pit a dressing with betadine solution on but it is quite painful and still throbs. Any advice?