Plantar Fasciitis/Fasciosis (inflammation v. degeneration) is when you experience pain on the bottom of your heel and is considered one of the most common causes of heel pain. The plantar fascia is the thick tissue that connects your heel bone to your toes. If you strain the tendon(s) that support your arch, it can cause tiny tears which can lead to a stabbing pain and swelling. It is more likely to happen if you are overweight, if you stand/walk for long periods of time, or wear shoes that don’t fit correctly. Classically, the worst pain is the first step out of bed, but can also be triggered by inactivity throughout the day.