Hello. Thanks for writing your query to us
I can understand how difficult it could be having this chronic condition unresolved.
Plantar fasciitis is condition where the fascia(connective tissue) that is present in the sole gets inflamed and leads to pain. It is a very common finding and is mostly seen in individuals who are athletes and obese, who project a strain on their soles. It is usual to notice pain initially for a few minutes after standing and it increases with walking. If untreated or improperly treated it could lead to a chronic non inflammatory condition that is more complicated.
In your case, the Plantar fasciitis itself might be the reason for long standing pain. The pain could also result from the inflammation of capsule around the metatarsals, called metatarsalgia. If these conditions progress, they would lead to pain in the ankle and knee joints. I would recommend the following to you:
1)Take rest for at least 3 weeks.
2)Do some massages that would relieve your pain
3)Do some stretching exercises regularly
4)Apply heat or cold compresses to combat inflammation
5)Use anti inflammatory medications to subside the effects of inflammation
6)Consult a podiatrist and an orthopedician for steroid injection and surgery in case of unresolved conditions.
Hope this helps.