Acute and Transient Psychotic Disorders (ATPD) are a group of severe mental disorders characterized by the sudden onset of psychotic symptoms, usually developing within two weeks. These disorders are often associated with acute stress, although they may also occur without any identifiable stressor. ATPD is classified under the International Classification of Diseases (ICD-10 and ICD-11) and is distinguished by its rapid onset, polymorphic symptoms, and generally favorable prognosis. Early recognition and prompt treatment are essential to prevent complications and promote recovery. The clinical features of ATPD vary from person to person and may change rapidly over hours or days. The most common symptom is the sudden development of psychosis, including delusions, hallucinations, disorganized thinking, and disturbed behavior. Delusions may involve persecution, grandiosity, reference, or bizarre beliefs. Hallucinations are usually auditory but may also involve visual or tactile experiences. Patients often exhibit confusion, perplexity, emotional instability, and fluctuating levels of consciousness without evidence of an organic brain disorder. Mood disturbances are common and may include anxiety, fear, irritability, elation, or depression. Emotional expressions can change rapidly, leading to a polymorphic clinical picture. Some individuals become highly agitated, restless, or aggressive, while others may appear withdrawn or fearful. Sleep