Unless you are sure someone you love is consuming a lot of alcohol, the signs of alcoholism could very well escape you. However, it is unlikely you are missing the connection, especially if you live in the same house. One of the most prevalent and noticeable signs of alcoholism is mood swings. When a person has gone without alcohol for a day or two so that he can function at his job, he is apt to have mood swings and be irritable. Some will blame it on job stress or finances. The truth is, it is withdrawal from alcohol and a very common sign of alcoholism.