Pain in the tendon of the arch

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I’ve been looking for similar symptoms in Google but can’t find it so I thought I would ask here. When I put my search terms in it often comes back with plantar fasciitis but in that case, the inflammation shows on the bottom of the foot near the heel. In my case, all of the pain is located in the tendon but only in the center of the arch. It is the left foot and I have had no injury that I am aware of. I walk about a mile a day and the only other concern I have is that my weight is at an all-time high of 235 For a male 5’11”, 54 yrs old. I will say that it hasn’t hurt to walk yet but at night when I take my shoe off that tendon is extremely painful to touch. I tried using a vibrating massager on it but I don’t think it has done much to alleviate the pain. I’m just wondering if this is something that will go away on its own or will I be dealing with this from here on out? Many thanks for the read.