Hi Dr. Batra, I am Tarun Lakhani from Hyderabad, India. I have this disorder known as Hidradenitis Suppurativa. Its on my under arms, less frequent than before. It first appeared mid 2006 and after taking medication prescribed by a doctor, didnt have it again till early 2008. I was again prescribed Cifran 500 which i use when i feel i have a lump comming up. Now, i think i have a small lump appearing on my right inner thigh. its not that painful, but just to be sure, after checking out medications online, would it be advisable to use Tetracyline, ciprofloxcilin or erythromycin? Kindly awaiting your responce.