Greetings - She must immediately visit a qualified dermatologist and get the lesion on the right sole biopsied- its better to rule out certain possible diagnoses and if the biopsy report is benign - it can be subsequently treated with other measure. The spots on the upper limbs appear harmless and could be a result of age related changes.
Next Steps
DO NOT IGNORE THE FOOT LESION - GET BIOPSY DONE AT THE EARLIEST
Health Tips
Further queries / discussion regarding biopsy report can be sent on Practo Direct