Morning Heel Pain I Have A Burning Pain In My Heel When I Wake Up In The Morning. It Lasts 30 Seconds And Then It Goes Away?

I have a burning pain in my heel when I wake up in the morning. It lasts 30 seconds and then it goes away? - morning heel pain

I think it is a spur or plantar fasciitis, but it hurts when I walk.
What is it?
Thank you for your help