Demonstrations have become more visible across Europe since the Great Recession. To clarify the connection between crisis and protest, we open the black box of crisis-related grievances, suggesting a typology for this subjective phenomenon and addressing the mediating role of emotions on protest. Using panel data, we explore the dimensionality of thirty different items that Spanish citizens have claimed to endure as a consequence of the crisis, and then we test their potential of these grievances as triggers of protest. Results show that both financial deprivation and grievances related to worker-citizens' status and rights encourage protest activity. Crisis-related grievances trigger negative emotions, and curiously enough, both anger and anxiety boost protest. Our findings hold, regardless of political ideology, previous participation, or perceptions of self-efficacy.