T hose with cancer may need surgery, chemotherapy , or radiation therapy . Medications, such as antidepressants, are often used for mood problems, such as depression . Side effects depend on the treatments used for the irritability. For example, antibiotics can cause stomach upset, allergic reactions , and other effects. Surgery poses a risk of infection, bleeding, or allergic reaction to anesthesia .
Chemotherapy can cause many side effects, such as stomach upset, hair loss , and weakness .
Such a person may be fine and able to return to normal activities. In other cases, the cause cannot be cured and needs further treatment. Someone with irritability from a mild illness or infection can often monitor his or her own symptoms at home. Any new or worsening symptoms should be reported to the healthcare provider. Other monitoring may be needed for the underlying cause.