In this article, we seek to extract the themes that patients share when they express negative emotions in the context of follow-up consultation of chronic illness. We are mainly interested in patients with chronic illnesses, as these pathologies have a significant emotional overload leading to a significant deterioration of the patient's quality of life. Our corpus included audio recordings of 12 chronic disease follow-up consultations conducted by physicians practicing in neurology, nutrition, internal medicine and infectiology. The 12 patients participating suffer from various chronic diseases: Parkinson's, HIV, diabetes, etc. We performed thematic content analyses on the emotional sequences in order to extract the themes underlying these emotional expressions. The 10 themes we have extracted are related to physical aspects, psychological aspects, the healthcare system and/or the healthcare provider, prognostic elements, social life, family life, aspects of professional life, issues of daily life, treatments and finally, aspects related to objectives and disease progress. Our results show that follow-up consultations for chronic illnesses are consultations during which patients express emotions for different purposes. These emotional expressions concern particular themes that are not found in other forms of medical consultations. We will compare these results in the discussion part of this article.