Heel pain without injury, most often is an inflammation of the fascia on the bottom of the arch, known as plantar fasciitis.
It can begin fairly mild and gets progressively more painful as the inflammation increases and the fascia become tighter. It’s characterized by severe pain in the morning or when standing after sitting or having to furniture walk at first. It feels a bit better with stretching or “warming up,“ but can be very achy by evening if you’ve been very active. This condition also can be related to a plantar heel spur, which can be seen on an x-ray.”
“If the pain is on the back of the heel or pump bump area, it’s usually related to a posterior heel spur or an inflammation of the insertion of the Achilles tendon on the back of the heel. The inflammation of the second foot can be due to compensating or walking differently on the more painful foot, which can cause overload or strain of the better foot.