I have foot drop. It does cause my feet to feel numb, and I occasionally have a swollen feeling (without being swollen). The numbness seems to be more on the top of my foot, rather than the bottom.
When you experience foot drop, your will also have weakness in your ankles and toes. I have a hard time pointing my toes upwards and in a downward position. This is also the case with my ankle. It seems like it stops at a less than a 90 degree angle, and will not bend upward or downward fully. It only effects my left foot/leg and because of my ankle and foot reacting this way, I walk with a limp.
Depending on my fatigue level, and how much I've use the leg, my leg/foot issue will be worse in the evening, however, I wake up with this numbness on a daily bases. Because of the weakness in my toes, I can no longer get up on my tippy toes on that leg, and I can not walk on my heels. These are some of the type of test the neuro will have you perform during a neuro check to test for weakness in the foot/leg.(getting up on your tippy toes, walking on your heels).
If this sounds like what you are experiencing, I would contact you doctor for a check. Foot drop according to the Mayo clinic is caused by:
weakness or paralysis of the muscles below the knee involved in lifting the front part of the foot. The underlying causes of foot drop are varied. Often, neurological, muscular and anatomical problems overlap.
Specific foot drop causes may include:
Muscle or nerve damage. An injury to the muscles that control the ankle and toes can cause foot drop. Sometimes nerve damage — from an injury to the nerves in the lower spine or leg to the long-term nerve damage of diabetes (neuropathy) — causes foot drop. In other cases, nerve damage occurs during hip or knee replacement surgery. Pressure to the nerve on the outside of the shinbone just below the knee (peroneal or fibular nerve), as you might experience if you sit with your legs crossed for too long, can trigger temporary foot drop.
Muscle or nerve disorders. Various forms of muscular dystrophy, an inherited disease that causes progressive muscle weakness, may contribute to foot drop. Various forms of compartment syndrome, a condition characterized by the compression of nerves and blood vessels within an enclosed space, may have the same effect.
Central nervous system disorders. Disorders that affect the spinal cord or brain — such as amyotrophic lateral sclerosis (ALS), multiple sclerosis or stroke — may cause foot drop.
I have this issue also, I literally lose circulation in my lower legs at times. Standing in one place for a few minutes (even doing dishes) my feet and lower legs turn purple. Very painful. I have found that the more active I am, the end of the day it is worse. I sometimes feel as if I am walking on needles.
Sounds a lot like something I had a few years ago called plantar fasciitis. You can look up the definition, but it involves the tendons on the bottom of the foot where they attach to the heel and follows the arch of your foot. The areas where they attach get microscopic tears when you stand up after being off your feet for any length of time(the longer you are off your feet, the worse the pain when you stand back up again).
A podiatrist can help treat you if this is the problem-usually with arch supports or sometimes with a splint to wear at night to keep your foot flexed; both methods accomplish the same thing by keeping the tendons stretched out so they don't develop tears each time you are on your feet.
I hope this helps a little...good luck and hope you are on the mend soon!
Jen