As a clinical physio, I see these pains alot. And they differ anywhere along the fascia plantaris tendon. If the pain lies around your calcaneus anterior edge or behind this point - it might be something completely different. But if your pain is in the actual plantaris tendon between the tarsals and the calcaneus, its worth looking into wheter youre structurally instable in your ossis navicularis, meaning you are a functional Glosbe. Then you would need some sort of arch support, either in the shoe, or as a partial insole.
There is a clinically proven way to train yourself out of this.
Put a rolled up towel on the edge of a step
Align your injured foot on the edge, putting the full weight on the balls of your foot. NO SHOES!
You're working 3x12 reps
- Plantarflex your foot over 3 seconds till you are on your toes (concentric face)
- Hold this position for 2 seconds (Static Face)
- bring your ancle into full dorsiflexion over 2 seconds (Excentric face)
You need to work with 12 Rep Max (so put on a bag filled with heavy objects till you find the correct weight.)
You should be pain free within 3 months.
For a easy quick soloution use sportstape/leukotape to minimize the strech of the ligament.
https://www.pinterest.com/pin/107242034852830311/Hope this helps.