Palpitation is an awareness of the abnormal beating of the heart. It may occur in people with or without heart problems. Heart palpitations when lying down is not a common occurrence and can be caused by various factors.
Flat feet occur when the normal foot arches have partially or completely collapsed. When the foot is put to the ground the inner or middle side of the foot comes down to the floor rather than remaining raised. This can cause the whole foot to roll inwards (this is called over-pronation).
Several things may cause numbing in your feet. One cause could be from diabetes. When diabetes is untreated, unrecognized, or undertreated it can cause damage to your nerves. This condition is known as neuropathy. Another cause could come from circulatory problems in your feet. If you are wearing shoes that are too tight, the circulation, or blood flow, to your feet can be decreased. If you have unknown, untreated, or undertreated high blood pressure, this too can cause circulation problems, which could lead to numbness in your feet. If you have any type of decreased flow to or from your feet, numbness in your feet may also arise.