After the fat grafting procedure
Because the fat is harvested from your own body, an allergic reaction is not a risk for fat grafting. However, there is still a small risk of infection and other infrequent complications. While some treatments require a recovery period, many patients resume normal activity right away after fat grafting.
You can expect some swelling, bruising, or redness in both the donor and recipient sites. The severity of these symptoms depends upon the size and location of the treated area. Please note that you will need to stay out of the sun until redness and bruising subsides (usually about 48 hours).
In the meantime, you may use makeup with sunblock protection. In some cases, swelling and puffiness in the recipient site lasts several weeks, especially if a large area was filled.