I have had lumps in both armpits for 12 weeks. I have had a mammogram (negative), ultrasound (negative), chest x-ray (negative) and CBC (normal). A breast surgeon I visited yesterday said "inflammatory breast tissue" and prescribed anti-inflammatory medication. My question is "what causes this"? I have never had such a condition in my 42 years. I am still experiencing regular cycles. I did have a viral infection resulting in a full trunk body rash and aching joints 14 weeks ago. He said he saw no connection. In the meantime, the joints of my feet and knees are aching even after sitting for a time. Again, he saw no connection.