Symptoms of mental illness include alcohol or drug abuse, mood disorders, problems with concentration and thinking, and nervousness, according to Mayo Clinic. Hallucinations, delusions, social withdrawal, excessive tiredness and weakness may indicate that a person has mental health problems as well. Certain environmental and genetic conditions may cause the problem.
Other signs and symptoms of mental illness include having suicidal thoughts and eating abnormally, as Mayo Clinic explains. A person who has suicidal thoughts requires immediate hospitalization. Mental illness may lead to homelessness, poverty, social problems, chronic medical conditions and financial difficulties.
Causes of mental illness include neurotransmitters that don't function properly, a family history of mental problems, and exposure to toxins or certain environmental conditions, states Mayo Clinic. Alcohol or drug abuse may also trigger mental disease. Child abuse and neglect, a personal history of mental illness, brain damage and having a chronic medical condition are risk factors.
A physical examination, a psychological assessment and certain lab tests help to diagnose different mental conditions, according to Mayo Clinic. Treatment depends upon the type and severity of the illness and includes taking antidepressants, antipsychotic medications and anti-anxiety medications. Certain medications may help stabilize moods. Psychotherapy and staying active may also be helpful.