Step 1: The question asks for the incorrect statement. Treatment of a haematoma depends on its location, symptoms, and the clinical situation; some need no treatment while others are emergencies.
Step 2: It is false that a haematoma must always be operated. Many small, symptom-free haematomas need no medical or surgical treatment, and superficial ones often resolve with rest, ice, compression, and elevation (RICE). So option 3 is the answer.
Step 3: Imaging such as MRI does help assess haemorrhage, and Glasgow Coma Scale (GCS) assessment helps in prognosis, so options 1 and 2 are correct statements.
Step 4: Since only one statement is wrong, the combined option 4 is not the answer.