Jenny O. Sobera, MD

IPL should not cause swelling for 7 days or rough skin and bumps.  It also should not cause sunken skin.  You should contact your medical doctor.  

When treating pigmented lesions, such as photodamage, the light is absorbed by the melanin making up the brown spot.  The body's natural processes work to get rid of the damaged tissue, revealing more youthful looking skin after about a week.  Make sure not to pick at the spots, they will flake off like coffee grounds for about 7-14 days after your treatment.

Looks like you are going to have a great result from your IPL treatment.  Make sure to protect your skin from the sun while your skin heals.