Hi, thanks for writing to HCM. Generally, hematomas will resolve spontaneously within 3 weeks ( depending on the size ). At times, they may become organized and appear as hard lumps. I personally feel that there is no urgency. Some times, huge hematomas may cause pressure symptoms on the surrounding structures (in your case, pressure on sciatic nerve
will cause tingling
down the leg) in which case surgical intervention is needed.
Also, in diabetic patients, the hematomas more often gets infected and forms a local abscess which needs surgical drainage
. Hope this helps