Inflammation (irritation and swelling with presence of extra immune cells) of the plantar fascia can cause heel pain and make walking difficult. Some risk factors for development of this problem include foot arch problems (both flat foot and high arches), obesity, sudden weight gain, running and a tight Achilles tendon.
Update Date 3/8/2014
Updated by: C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery, San Francisco, CA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.