療 medical therapy

The nurse made small talk with the sick patient, to distract him as she did some painful therapy.

medical treatment ★☆☆☆☆
医 (doctor) + 療 (medical therapy) = 医療 (medical treatment)

medical treatment- the kind one gets in a hospital (x-rays, MRI, surgery, etc.)

therapy ☆☆☆☆☆
治 (cure) + 療 (medical therapy) = 治療 (therapy)

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)