Flat feet problem...
Do my flat feet require treatment like custom orthotics, or are they a harmless variation, and how can I tell if my arch flattening is causing my foot, ankle, or leg pain?

Honestly, flat feet can go either way - some people have them their whole life with zero issues, while others do get foot or ankle pain that gets worse over time. The thing is, you can't really tell on your own whether yours will cause problems or if the pain you're feeling is actually from the flat feet or something else entirely. I'd say it's worth bringing it up with your doctor or PD just to get them to assess whether your arches are affecting how you walk or putting strain on your ankles and legs, because that's when orthotics might actually help. In the meantime, if you're getting pain, see if it eases with rest or if certain shoes make it better or worse - that can give your doctor useful info too.
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