CS Track has analysed 17,122 Citizen Science tweets filtered with Health keywords in order to answer the following questions: What are the most used hashtags in the e-Health discussion? Are hashtags normally used alone or alongside others on the same theme? How do you use and choose the hashtags you use? https://cstrack.eu/format/graphical-article/how-does-the-citizen-science-community-use-hashtags-when-discussing-e-health/