Early symptoms may include experiencing psychotic symptoms such as hallucinations, because certain pathways in their brains are being activated when they shouldn't be. Another worrisome quality is suspiciousness or paranoia. Also, young people might have difficulty expressing themselves verbally, when they didn't previously have trouble organizing their thoughts. Other early problems may include sleep difficulties and anxiety or depressed mood that is not severe enough to meet criteria for a major depressive episode.
There are a couple of ways that schizophrenia can develop. Schizophrenia is a lot easier to recognize when there is a very sudden onset. When, one day, they're doing fine, the next day, they're hallucinating and paranoid, then you know there's something wrong. But schizophrenia can also develop insidiously and slowly.
What are the early signs of bipolar disorder?
Bipolar disorder includes manic episodes and major depressive episodes. Mania is a mood state that is characterized by a dramatic change for at least a one-week period where they tend to be either euphoric or irritable or angry beyond what the situation would normally cause. Other symptoms include a decreased need for sleep, and an increased energy level. They also have an increase in risky behavior, such as excessive shopping or gambling, or being sexually promiscuous.
A depressive episode involves a change in one's mood to sadness or irritability that lasts for at least two weeks and includes changes in sleep and appetite, and low energy.