Leg Swelling and Lump Above Ankle

My legs have been swollen from the knee's down for a little while, maybe a month.  I also have a lump that seems like a vein jetting out of the outside of my leg above the ankle.  It isn't discolored, and is soft to touch.

I watch my diet very closely because I have a recurring SIBO infection, but I have noticed a little weight gain.  My sodium is pretty low for the average person (so still probably high haha), my protein is high, I eat around 100 carbs a day, and am gluten free (my celiac tests were inconclusive), and lactose intolerant.  I only mention this because I did take some prescription water pills and I work out about an hour every day but that doesn't seem to reduce or increase the swelling.

I'm wondering what this could be?  Should I be extremely concerned about something like a blood clot?  Could this be related to the fact that I haven't been able to intake much fiber (SIBO)?  I'm just throwing out things that have changed recently.

[AlleyJames]

Have you check that what it is like is it painful or hurting to touch. visit your doctor and have screend that to see what it is.

[silverfox67]

Have you seen a cardiologist?  Edema is a sign of Congestive Heart Failure.  You may not have it, but it would be a good idea to rule it out.

[mkh9]

I would worry about a blood clot too since your leg is swollen and the lump too. Is the lump or leg painful and/or red? I would see a doctor about it. They should also figure out if the swelling in the legs is due to a clot or bad circulation or if there is an infection going on. Since it is on both sides It may be something else.
mkh9