When the Body Says No by Gabor Maté explores the connection between hidden stress and chronic illness, arguing that emotional suppression and the inability to say no can contribute to diseases like cancer, diabetes, heart disease, and arthritis. The book uses medical research, clinical experience, and case studies of patients with chronic illnesses to illustrate how psychological factors can manifest physically. Maté discusses how suppressed emotions and trauma are linked to illness, and presents “The Seven A’s of Healing” as principles for overcoming stress-related diseases.