Mental health conditions can lead to a broad range of symptoms. These vary based on the type, but may include; Behavior that seems out of character, Changes in appetite, sex drive or daily functioning, Difficulty identifying reality (hallucinations or delusions), Excessive worry, fear or unusual thoughts, Feeling disconnected from yourself or others, Heightened sensitivity to light, sound or smell, Loss of interest in usual activities, Mood swings or exaggerated emotions, Performance issues at work or school, or relationship challenges, Self-harm or thoughts of suicide, Trouble sleeping.