Do you have pain to your heel with the first step in the morning or at night?

If your answer is yes, then you could have what is called “Plantar Fasciitis” and/or Heel Spur Syndrome
Do you experience pain in the ball of the foot around the great toe area during activity?
If so you might have sesamoiditis. The sesamoids are two small bones in your foot, about the size of a corn kernel, which when compared to most of the bones in the human body; they do not connect to another bone. They are connected to tendons and found in the area of the great toe. Since the sesamoids are connected to tendons, these tendons as well as the sesamoid bones can become inflammed resulting in "sesamoiditis".
What can cause sesamoiditis?
Some of the causes for sesamoiditis are simply due to biomechanics of your feet. When there is a fault to the biomechanics of the foot, there will be more pressure to certain areas of the foot and thus the ball of your foot is a very common location. Your foot shape could attribute to sesamoiditis as well. For example, in patients with high arched feet, when they walk they will hit the floor with the ball of the feet and thus creating more microtrauma to the sesamoid bones. 
What are some other causes of sesamoiditis?
Another reason for sesamoiditis could be found in persons that do not have enough fat to protect their feet or they just have bony feet. These persons have lost their protective fat pad from the ball of the foot and thus will experience more microtrauma to this area. Also an abrupt increase in your activity could cause sesamoiditis and could even create a fracture of the sesamoids.
What can make the sesamoiditis worse?
Simply walking or any activity that would place your feet in constant pressure to the ball of your feet could aggravate this problem.
Who is more prone to develop pain to the ball of the foot?
Pain to the ball of the foot is usually associated with any microtrauma to the forefoot. Most of the time it is very common in ballet dancing, running, jogging, playing tennis, even walking or any activity that would require placing pressure to the ball of the foot.
What are some signs and symptoms for sesamoiditis?
Sesamoiditis usually begins with a mild ache around ball of the foot usually benith the base of the big toe, which will intensify with activity and could become an intense throbbing. Also there may be swelling and/or bruising present around the area of the plantar big toe base.
How could you prevent sesamoiditis?
The best way to prevent this is with custom made arch supports to prevent faulty biomechanics of your feet. It is also important to avoid abrupt increase in your activity level and avoid walking barefooted.