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).
Flat feet (pes planus) refer to a change in foot shape in which the foot does not have a normal arch when standing. Flat feet are a common condition. The condition is normal in infants and toddlers. Flat feet occur because the tissues holding the joints in the foot together (called tendons) are loose. The tissues tighten and form an arch as children grow older. This will take place by the time the child is 2 or 3 years old. Most people have normal arches by the time they are adults.