How long does it take celluilitis to heal? it's been weeks and i've been on antibiotics for 3wks & still not completely healed. why could this be?

Might be that your: Skin issue is either not bacterial, you could be on the wrong antibiotic, or not cellulitis at all. Cellulitis generally heals within 10-14 days.

Depends on the cause: Depends on the causative bacteria and if you are being treated with the right IV or oral antibiotics if there is no improvement you need to be reevaluated, as it can be due to resistance to antibiotics or the wrong choice.You did not mention the site of cellulitis, you may have underlying osteomyelitis are you a diabetic or have any other condition get it reevaluated by your doc or id.

What's the cause: Cellulitis is basically a visible inflammation (itis) of the skin and soft tissues (red, hot, swollen and tender) . It can be caused by many things including sunburn (radiation), trauma (sprained ankle) or poor vein circulation (stasis dermatitis). It need not be caused by bacteria. If you have repeated episodes of this, get to a wound care or vascular specialist, the diagnoses you have is wrong.