What else can cause heel pain other than plantar fasciitis. back and bottom heel pain. feels good in am. worse as day goes on.?

Multiple: Achilles tendinitis absence fat padding posterior spurring.

Nerves, tendons...: The most common cause of heel pain is plantar fasciitis, but there are others, too. An irritated or entraped nerve can cause pain as the day goes on, as can tendinitis: the three most common being achilles, peroneal, or posterior tibial tendinitis. You may also have a haglund's deformity: a bony bump that can irritate the achilles from the inside.

Many possibilities: Heel pain is most often caused by plantar fasciitis, a condition that is sometimes also called heel spur syndrome when a spur is present. Heel pain may also be due to other causes, such as, infection, tendonitis, arthritis, stress fracture, nerve irritation, retained foreign body, bone tumor, or a cyst. Have it evaluated by a professional and get the appropriate treatment.