Normally, "Microswelling" subsides after 24 hours. Icing the area after can help to subside much of the swelling. Make sure to avoid any exercise where you will be sweating, hot showers and public pools to avoid further skin irritation. As soon as swelling goes down, you can cover any redness...
It is common to have the pixilated imprint of the LUX 1540 laser after the treatment. Once the redness and swelling goes away the remaining imprint of the laser appears and may even look as a area of a brown pigmented lesion.
The length of time it maybe noticeable depends on the type of skin...
These two devices are often used together to treat acne and surgical scarring. First, the IPL is used to decrease the redness in the skin, followed by the 1540 to gently resurface the scar and to stimulate production of healthy collagen. Both offer minimal-downtime treatments. Best Wishes.