After sun exposure IPL treatment is not recommended, your skin is sensitive from the sun and will cause burning if treatment is done. To avoid any burning let your skin heal or until tan is gone, then schedule appointment for treatment. IPL treatments are not recommended if you are going to...
Often times brown pigment becomes more pronounced and red pigment can become darker after your IPL treatment. This usually resolved within 1-2 weeks. In the interim, make sure you are not rubbing, scrubbing or exfoliating the area harshly.
IPL treatment for your keloids will not help at all. IPL or intense pulse light treatment is useful to treat pigmented and vascular skin abnormalities mostly on the face chest and upper extremities .