After a facelift, how long does it take for lumps in my cheeks to disappear? (photos)

At four months there may indeed be some persistent swelling but a noticeable lump would be on anticipated. This is something that should be shown to your surgeon.

It is not unusual to have irregularities following a facelift. It can take 6-12 months for this to improve and massage is generally the best thing. There are lymphatic massage tools that can also help. It would be rare for this to be permanent. Occasionally fat transfer or fillers may be employed but this is likely to settle without further intervention. Keep in touch with your PS who is best to advise you.

Bhtyoung - it is unlikely that these lumps will be permanent, but it remains too early to tell.  Lumps such as these can arise from any number of reasons including, normal swelling and scar formation, sutures used to perform suspension during the lift, fat grafting if this was done at the same time, resolving blood from a hematoma, and even infection - to name a few.  I would agree with continued massage and patience.  I would also discuss this with your surgeon - they will know what what done and what the culprit may be.  Based on their assessment they can determine if something like a steroid injection would be beneficial or if this will simply resolve with time.  Stay optimistic and enjoy your rejuvenated face!