<s>[INST] i have some type of zid on the back of my head it hearts when i touch it and that bumb is hairless, but i picnhed it already and yes lots of pus came out of it i took ice and had for like 5 minutes, what do i do now? thanks for helping i need help please [/INST] Thank you for query. It may be due to bacterial infection. Clean the area with warm water twice daily. You can apply topical antibiotics like Funding or Tract, and take analgesic like broken. You may need oral antibiotics .see that there is no friction or irritation. If it does not subside consult dermatologist else you can send the photo directly to me with the details I will be able to help you. Chat Doctor.  </s>