Transconjunctival blepharoplasty 1 week ago. Lump under my eye is hard and painful (photos)

See your surgeon ASAP - either residual fat or a small hematoma. But over the internet can not be sure....

There can significant swelling and even lumpy firmness.  This can all be normal.  However, that is not the answer you need.  The answer you need can only come from your operative surgeon.  They may need to see you or they may feel comfortable enough to see you at your next schedule post operative visit.  I personally see my post operative lower eyelid surgery patients the day after surgery, 7 days after surgery and 3 weeks after surgery assuming everything is going smoothly.

I always tell my patients not to look too much in the first week. It's way too early to draw any conclusions and my advice at this point would be to follow up with your surgeon. Good luck!