• Excessive fear, worries, or anxieties (paranoia)
• Strange thoughts (delusions)
• Feelings of extreme highs and lows
• Prolonged depression
• Strong feelings of anger
Overall, the most important sign to look for when looking for signs of a mental illness is any sudden change in the person’s mood, behavior, or habits. This can be the first signal that something is wrong. If these changes continue or worsen, treatment may be necessary.