Considering the family as a source of support to the patient, this study aimed to analyze the problematics concerning people with diabetes in the opinion of relatives, in an outpatient unit of a university hospital in the interior of Brazil. Data were collected through semi-structured interviews with 24 family members. Descriptive statistics were used for data presentation and analysis. Results showed that the family members partially knew about the causes of diabetes. Regarding treatment adherence discussions, 70.8% considered an adequate diet a priority, which was concomitantly highlighted as a problem. Concerning related diseases, 23 persons pointed out kidney and vision problems. With respect to feet care, they emphasized the use of clean cotton socks. 83.3% had contact with patients with feet problems, mentioning amputations/ulcers. Data pointed out the need for educating family members, since they are a source of support in controlling the disease control and preventing complications.