What causes lump on knee?
Patient: I have these pink bumps along my left knee that have suddenly appeared a month or so ago. I thought that it may be simple bug bites at first, but they got bigger, and they each have a hole in them with this white, crusty-like substance in it. I'd say they are about the size of an average lady bug. Doctor: Hello there... According to your problem it looks like due to some infection...and now they have hole with white crusty substance...means it has been burstsed open and all  the infectious material has came out...so it will heal soon.. just keep the part clean and dry... u can use betadine powder to make it dry... if u r feeling pain and redness.. u can use tablet brufen 400mg maximum upto three times a day...Thanks for asking....Get well soon...