Hi
if you have-not injured your heel at the time of pain initiation , then according to your age group plantar fasciopathy is responsible for these symptoms of yours.
Avoid walking bare foot, try soft soled footwear or put silicon heel pads under your heel inserted in your most commonly worn footwear.
Hot packs helps in relieving stiffness, can try.
But, Consult sports medicine specialist or orthopedist or good physiotherapist for evaluation and further management.
Next Steps
In electrotherapy ask for SHOCK WAVE THERAPY (ESWT) ,if applicable in your case.