I have been involved in international public health projects lately and tried to apply design methodologies during the process as much as possible: interviews, observation, research, ideation, prototype, testing etc etc. However, one of the biggest obstacles I found is that not many users open up to talk about their needs or thoughts, especially in developing countries. Health topics tend to be private and often misunderstood.
Then how designers can discover problems, gaps, or needs? Some designers consider this barrier as a cultural gap and used fun tools to open up meaningful conversations.