Seromas can form shortly after surgery if drains are not used, and they may also occur after removal of a drain. Small seromas often resolve on their own, although left untreated, they can calcify, forming hard knots.

How long does it take for seroma to calcify?

Most seromas heal naturally. They are usually reabsorbed into the body within a month , although this can take up to a year. In more severe cases, it can take up to a year for them to be reabsorbed, or they can form a capsule and remain until they are removed surgically.

How long does serous fluid last?

Serous and serosanguinous drainage are normal for the first two or three days. But you should watch for signs that the amount of blood mixed with serum is increasing.