Our expert says:
She may have very slow blood flow through the legs causing stasis of the blood - this can cause rashes, even ulcers. It may help if she wears elastic/compression stockings or flight socks to assist with circulation. These are however quite expensive. The hand problem sounds like an infection due to something that bit her and she may need antibiotics for that.
See also http://www.podiatrynetwork.com/document_disorders.cfm?id=202
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