If you are suffering from Plantar fasciitis, it probably means that you have inflammation of your plantar fascia. This is ligament-like tissue stretching from the heel of your foot to the middle foot bone. It does the job of supporting the arch of your foot; almost like being a shock-absorber for your foot. When this area becomes inflamed, it will cause you to suffer from pain under your heel or heels, usually disappearing with time. You will certainly speed up the recovery time with some treatment; such as resting the foot, wearing good footwear, inserting heel pads, exercising and taking pain killers. If your case is severe, you might need a steroid injection from a doctor.