Summarize this article:

If you find yourself being irritable on a regular basis, you need to determine the reason. Irritability can be a symptom of underlying health issues such as anxiety and depression. In women, hormonal imbalance can lead to irritability.  Irritability can also be a symptom of serious illness such as cardiovascular disease or lung disease. Certain medications can also cause irritability. Ask your doctor to help you find the cause of your problem. Consult your doctor on the best way to treat your irritability. If it is a symptom of a physical ailment, such as chronic pain, it is time to be more aggressive in treating your illness. Ask your doctor to suggest changes in your medication or lifestyle. If your doctor concludes that your irritability is the result of a mental health issue, such as anxiety or depression, ask him to refer a counselor. Talk therapy can be very effective in helping you deal with these issues. If your irritability is not the result of a physical problem, it is likely situational. That means it is caused by something going on in your life: stress at work, or problems in a relationship. Spend some time trying to pinpoint what it is that is making you unhappy. Then take steps to try to make positive changes in that area.  If you find that work is one of the major causes of your bad mood, consider making a career change. Make a list of the things you consider most important in a job: pay, creative challenges, security, a positive work environment. Then spend some time brainstorming what sort of career would best suit you. If you are having a problem with a personal relationship, try to communicate your thoughts to the other person. For example, if you find yourself constantly frustrated with your partner, ask to have a conversation about your feelings. Clearing the air can make you feel emotionally better, and can result in positive changes.

Summary:
Learn the cause. Consider treatment. Make a lifestyle change.