Constant Coming And Going Large Knee Area, Like Clockwork, Every

Constant coming and going large knee area, like clockwork, every 7-10 days my leg gets huge for 4 days, my docs are sating lymphadema! I'm only 32 started at 30, I haven't had cancer or any issues! Started the day after I had my son, I had an epidural! Could it be related? Please please help me!