Can ankle swelling ever related to lower back pain?

Indirectly. Low back pain is often from a strain of a muscle or problems with the vertebrae of the lumbar region. So, problems to the lower extremity are usually nerve related. However, if the back pain causes one to not walk or to constantly sit due to the pain, it can have an indirect effect due to not functioning properly. So technically - indirectly.
Sure. There are several diseases which may result in low back pain and ankle swelling, seronegatives such as ankylosing spondylitis, reiters disease and psoriatic arthritis could cause these things together. However, more often the symptoms are related to obesity and/or unusual levels of activity. If they persist or if you should encounter a temp. Contact your doc.

Related Questions

5'6, 127 lbs. Dx: o/a (r) knee from fall. Swelling ankle, top of foot, pain in toes (r foot), low back pain. Is this all related or something else?

Yes. If you have not injured yoursefl. When one joint in the body is not performing the way it should, the joints close to them pick up the slack. See your orhopod or rhuematologist who is taking care of you for further evaluation if needed. Read more...
It could be. Best to see a doctor as the important thing is to get better. Read more...

I take voltaren (diclofenac) 2x/day for chronic low back pain. But I also have swelling in hand/foot/knee that it doesn't help. I'm late 30's.What else could it be?

Voltaren (diclofenac) I would go see a doctor if i were you. What you got could be due to many different things, and more pertinent history such as would be necessary to throw some possible causes at you. Rheumatoid arthritis, lupus, arthritis due to inflammatory bowel disease or chronic hepatitis, or complex regional pain syndrome/rds are some of the possible causes. Voltaren (diclofenac) could be bad for your heart and kidneys. Read more...
Why back pain. Your evaluation needs to clarify why you have back pain. There are inflammatory back disorders such as ankylosing spondylitis that can respond to voltaren (diclofenac) and this inflammatory condition may be related to the swelling you are describing. Read more...
Side Effect? Swelling in the hands & feet could be a side effect of voltaren, (diclofenac) which can cause fluid retention, or excess protein loss in the urine, resulting in edema, or swelling due to having too much fluid in the tissues. Read more...

Recent fall while running. Diangosis 4 weeks ago with oa (knee). 7.5 mg mobic (meloxicam) daily. Now I have swelling 4th toe, right foot and low back pain. Related or not?

Possibly. Need complete history, examination and possibly x-rays and blood work. Read more...
S/p fall. Could be, depending how you fell, what you are feeling. There could be some pathology associated with the 4th toe and low back pain that may not have been easily identifiable at the time of examination. I would recommend you f/u with your ortho/pcp. Read more...
Possibly. Pain in the knee can cause mechanical low back or foot pain due to mechanical reasons. Other conditions like gout must be considered in the differential diagnosis of foot pain. Read more...