Which symptoms are commonly associated with headaches due to an intracranial tumor?

Headaches caused by intracranial tumors often present with specific symptoms that help in their identification. One key symptom is that pain typically worsens when the patient is in a supine position. This occurs because lying flat can increase intracranial pressure, leading to heightened headache intensity. Additionally, focal neurological signs may be present depending on the tumor's location and the areas of the brain it affects. These focal signs can include weakness, changes in sensation, or alterations in coordination, providing critical clues to the underlying issue.

The other symptoms mentioned in the other choices may relate to different conditions or complications but do not exclusively define headaches due to an intracranial tumor. For example, hyperreflexia and personality changes can occur in various neurological conditions but are not specifically indicative of an intracranial tumor. Acute onset headaches that rapidly increase in intensity over hours to days may suggest other urgent conditions, such as a cerebral hemorrhage. Symptoms like pupillary constriction and stupor can occur in different contexts but are not the hallmark features of headaches stemming from an intracranial tumor.

Therefore, recognizing the pattern of headache exacerbation when supine and the presence of focal neurological deficits are critical components in assessing the possibility of an intracranial tumor.