My heels hurt when i set foot down after sleep or after travelling in car for an hour or so. the pain gets worse when i walk for long hours. why?

Foot pain: It's possible you could have plantar fasciitis which is generally a conservative treatment plan but there could also be neurological or vascular issues. You should see a podiatrist to obtain the right diagnosis.

Plantar fascitis: The fascial ligament is contracting when you are at rest and the tension you are applying when weight bearing is causing pain.....