"Neurotic" or "psychoneurotic" are commonly used terms to describe someone who is suffering from a mental or emotional disorder, usually characterized by excessive anxiety, worry, or a range of other symptoms.
The term "neurotic" comes from the Greek word "neurosis," which was used by the ancient physician Hippocrates to describe a range of symptoms, including anxiety and depression, that were thought to have a physical cause. The term was later adopted by psychologists and psychiatrists to describe a group of mental disorders characterized by anxiety and emotional distress.
Examples:
She has a neurotic personapty, always worrying about things that aren't important.
(她有一种神经质的性格，总是担心不重要的事情。)
His neurotic behavior was getting in the way of his work and relationships.
(他神经质的行为妨碍了他的工作和人际关系。)
She was treated for psychoneurotic depression.
(她接受了治疗心理神经性抑郁症的治疗。)