Two seroma's formed over recent knee scrape, that has scared over nicely all three times in short healing period. DR wants to do untrasound to test for debris left under the skin, I think its not necessary as wound has healed fine each time, then 6 weeks later seroma formed. Seroma formed twice and has now healed twice, count three times when including original scrape on knee. Why has a seroma formed twice when wound healing appears healthy each time. I have never had this before, and no trauma to scar area after new scars form, the seromas just appear out of the blue. I have celiac disorder and poor wound healing is described as symptom... Help me!!