When you lay down at night the bottom of your feet hurt?

I had this same problem. I found that when I cut out ALL SUGAR and took a potassium supliment just for 3 days the pain went away. I'm not saying that's your problem but it was mine. I went to doctor and he couldn't tell me what was wrong. An Asian gal I worked with told me to try the above (bless her heart).

Could be a circulation problem. Go to the doctor!!

Could even be far more serious than that. Could be a thrombosis, which is a blood clot that is on its way to your brain to be a stroke, or your heart to become a heart attack. I agree you should see one.

It could also be a neuropathy. If you are a diabetic, this is the most likely cause. If you are diabetic, make sure you keep tight control on your blood sugar readings. You could be diabetic and not know it. Check with your doctor.