I had Mohs surgery on forehead. My eyelid is blood filled. How long should this last?

It is within normal limits to have bruising or eyelid swelling up to a few days after forehead surgery.The main thing to exclude is a hematoma which is typically a tender "lump" and represents a larger collection of blood (different than normal swelling and bruising).  Hematoma should be seen and sometimes needs treatment (drainage).If the surgical site is not tender and there is no tender lump and if the swelling is getting better over a few days that would suggest it is less likely a hematoma.Most reliable way to distinguish is to see the MD who did the surgery.

It is normal to get some swelling and bruising around the eyelid after Mohs surgery. I would recommend contacting your Mohs surgeon because they will likely want to see you or speak to you over the phone to make sure it isn't something more than bruising, such as a hematoma.