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Anger and depression are separate moods, but the two are often linked together so tightly that it can be difficult to distinguish one from the other. Irritability is often considered a symptom of clinical depression, but the connection goes deeper than that. Unchecked anger can actually trigger or worsen depression. Justified anger that drives you toward positive change can be a positive emotion, but oftentimes, people who struggle with depression find themselves dragged down by anger instead of helped by it. This anger is typically explosive, but for some individuals, it can be so deeply rooted that you barely recognize it. If your bouts of anger leave you feeling guilty, they're only feeding into your depression, no matter how good they feel initially. You'll need to control this type of anger before you can learn to control your depression. Before you can control your anger, you need to identify it. You'll also need to identify your depression and learn to distinguish one internal state from the other. By intentionally labeling your emotional state, whether it's anger or depression, you can capture your feelings and help prevent them from running unchecked. If you habitually suppress your anger, you may have trouble labeling it for what it is. Anger can masquerade itself as motivation by driving you to perform some immediate form of action. When the action you feel inclined to perform involves causing pain (emotional or physical) to yourself or others, the underlying state is likely anger. Anger is often symptomatic of a much deeper issue. To control your anger, you'll need to address the cause of it. The anger might be connected to the root of your depression. Past traumas, for instance, can trigger or worsen depression and may also cause bouts of anger to emerge when memory of that trauma threatens to resurface. Even if you can't connect anger to any past trauma, it still has a present day cause. You'll need to find a solution to that cause if you want to control the anger it evokes.
Understand the connection between anger and depression. Acknowledge both feelings. Consider the underlying issue.