The basic advice is to use sunscreen, cool compresses, and a retinol cream helps. Do NOT use a hemorrhoid cream!
There's more here:
http://www.webmd.com/beauty/eyes/ss/slideshow-banish-the-bags-under-your-eyes
From the Mayo Clinic:
http://www.mayoclinic.org/diseases-conditions/bags-under-eyes/basics/definition/con-20034185
See your doctor if the swelling:
- Is severe and persistent
- Is accompanied by redness, itching or pain
- Affects other parts of your body, such as your leg