Low back pain is caused by deficiency of kidney qi, which should be caused by kidney, bladder and other parts. The north belongs to water, which is in charge of kidney, bladder, intestine, ear and other parts. In addition, the toilet also corresponds to the kidney, bladder and urinary system. You should consider whether there are any bad things in the north, such as garbage, sundries and sharp things, such as needles, swords and decorations. And whether you suffocated and rushed into the bathroom door, such as the kitchen door.
About foot pain, it corresponds to the position in the east and southeast. These two positions belong to wood, which is in charge of people's liver, gallbladder, hands and feet. Things that can't be found in these two positions.
I hope it helps you.