The nurse made small talk with the sick patient, to distract him as she did some painful therapy.
medical treatment- the kind one gets in a hospital (x-rays, MRI, surgery, etc.)
medical therapy - for instance, cancer 治療 would be chemo. Unlike the related term 医療 （いりょう）、治療 refers to ongoing, repeated-once-a-day/week processes for specific illnesses)
治す が癒える を癒やす 治癒 治療 医療 手当て