Heel Pain,only right foot

Hi,
I also have heel pain too.My right foot only,and yes,especially after sleeping,and sitting off the foot for a period of time.
I absolutely cannot put pressure on my right heel in the morning,for at least 5-10 minutes.
It is a gradually applied pressure I have to do to be able to walk fully on my foot.
It is extremely painful,and frustrating.
I have had this problem for about 6-8 months,and it came suddenly one morning,and has never left.Once I am ‘up,and gradually walking on it,it is like nothing is there, I could walk miles and miles, but seems to be only when foot is sedentary,and not in use for awhile that it is back,and I have to walk on my right toes first,so please if you can also help me too, I would be grateful.