Can you please describe the behavioural and psychiatric changes manifested in thyroid disease?

Several : These include, fear, anxiety, irritability, depression, apathy, emotional lability, poor concentration, mental slowing, memory complaints, suicide ideation, delusion, decreased libido among the many.

Psychiatry: Sometimes for example low thyroid can present as tiredness, fatigue, weakness, dry hair, constipation, depression etc insomnia could indicate psychiatric illness up to 40 % of the time any physical or psychiatric symptoms causing distress need a medical and psychiatric evaluation.