Hello doctor, I am having an open wound on the underside of the right breast. I noticed it a few days back and is continuing to grow. I would like to know what it looks like and why I get an open wound in this location. I would also like to know if skin cancer can ever display in this way. I am using antibiotic cream for the same. Obviously, I know that a diagnosis can not be given online without testing, but would just like to know by the looks of it.
Hello. I have viewed the image. (attachment removed to protect patients identity).  It seems like a furuncle which is a skin and soft tissue infection (SSTI) and which has now burst open. I suggest you take an oral antibiotic, Amoxicillin, or Cephalexin for a week. Also, I suggest you use a topical antibiotic Neosporin ointment or Mupirocin 2% ointment twice daily.