The US Centers for Disease Control and Prevention (CDC) says symptoms of a mild traumatic brain injury may appear immediately or hours to days after the injury. Older adults can also develop a chronic subdural hematoma after a minor blow, so an initially normal appearance does not set an endpoint for observation.

Emergency signs come before home observation

Call the local emergency service if the person remains unconscious, cannot be woken, has a seizure, develops new weakness or numbness, or has trouble speaking or coordinating movement. The US CDC also lists a worsening headache that does not go away, repeated vomiting, one pupil larger than the other, increasing confusion, restlessness and unusual behavior as danger signs requiring immediate emergency care.

England's National Health Service (NHS) says urgent medical advice is needed after a head injury when the person vomits, feels dizzy, has a condition that affects clotting or takes medicine that reduces clotting. It calls for emergency help when someone cannot wake or stay awake, has a seizure, develops new weakness or problems with walking or speech, or sustained a high-speed or penetrating injury.

Do not delay emergency care to finish a checklist. Give responders the information already available, then bring a written medication list, medicine containers or photographs of their labels if this can be done without slowing transport.

Record six facts about the injury

A short factual record helps a clinician reconstruct what happened and compare the person's current condition with the pre-injury baseline. Record uncertainty instead of filling gaps from memory.

  • Time: Write the date and best estimate of the exact time of the fall or blow.
  • Mechanism: Note what caused the injury, the approximate fall height or speed, and whether another body part was injured.
  • Impact: Record where the head struck, any visible wound, and any new neck pain.
  • Immediate response: Note any loss of consciousness, memory gap, vomiting, seizure or unusual behavior.
  • Baseline: Describe the person's usual speech, alertness, memory, walking and use of both arms and legs.
  • Medicines: List every prescribed and nonprescription medicine, especially anticoagulants and antiplatelet medicines, with the last known dose time.

A familiar adult should cover the first 24 hours

Home observation is appropriate only after a clinician or local urgent-care service has decided the person does not need hospital care, or after hospital discharge with written instructions. The caregiver should keep those instructions available and use their return thresholds rather than a generic schedule.

The caregiver should know the person's usual behavior and check for changes in conversation, alertness, speech, balance, limb use, headache, nausea and vomiting. Write the time beside each observation and follow any intervals or return instructions supplied by the treating service; this guide does not set an hourly waking schedule.

England's National Health Service says a person sent home after a minor head injury does not need to stay awake when tired, but an adult should remain with them for at least 24 hours. Abnormal difficulty waking is an emergency sign, and sleeping pills should not be added during recovery unless a clinician advises them.

Medication and dementia change the assessment

The US CDC says traumatic brain injuries may be missed or misdiagnosed in older adults because symptoms overlap with conditions such as dementia, and that anticoagulant and antiplatelet medicines may increase the risk of bleeding in the brain after an injury. A caregiver should report the person's usual cognition and independence, every regular medicine and the last known dose time.

The UK Medicines and Healthcare products Regulatory Agency says people taking an oral anticoagulant should not suddenly stop treatment or change the dose unless their healthcare team directs them. A caregiver should not decide to skip an anticoagulant after the injury; an urgent-care clinician must balance bleeding and clotting risks.

A known bleeding or clotting disorder also requires prompt clinical advice after a head injury. When the person has dementia or another pre-injury cognitive impairment, the caregiver should state the usual level of memory, speech and independence because new confusion or slowing may otherwise be mistaken for the baseline.

New changes can appear over the following weeks

The US National Library of Medicine says chronic subdural hematoma is more common in older adults because age-related brain shrinkage stretches the veins between the brain and its outer covering, leaving them more likely to tear after even a minor head injury. Blood can collect slowly, and symptoms may appear weeks or months after the original event.

Seek prompt medical assessment for a new or worsening headache, increasing sleepiness, confusion, memory or personality change, slurred speech, trouble swallowing, new unsteadiness or repeated falls, or weakness or numbness in the face, arm or leg. A seizure, loss of consciousness or inability to wake still requires emergency help even when it occurs long after the injury.

Record the first time each change appeared and whether it is constant, intermittent or worsening. Tell the clinician about the earlier head injury even if the blow seemed minor or the person was not assessed at the time.

Keep a timeline that clinicians can scan

A usable log separates baseline function from changes after the injury. It should remain short enough to read during triage.

  • Event line: Date, time, place, cause and point of impact.
  • Baseline line: Usual alertness, memory, speech, walking, vision, hearing and daily assistance needs.
  • Symptom lines: Time-stamped headache, vomiting, drowsiness, confusion, behavior, speech, balance and limb changes.
  • Medication line: Medicine names, purpose if known, last dose time and any anticoagulant alert card.
  • Care line: Health service contacted, examination time, scan result if one was performed, and written return or follow-up instructions.
  • Observer line: Name of the person making each entry and a contact number for follow-up questions.

APPI News could not find a published, validated home checklist that allows a caregiver to rule out delayed intracranial bleeding. The record supports communication with clinicians; it does not diagnose concussion, exclude a hematoma or decide whether CT imaging is needed.

Frequently asked questions

Does the absence of a lump rule out bleeding?
No. A visible scalp lump describes the surface injury and cannot exclude bleeding around or within the brain; symptoms, medicines, the injury mechanism and a clinical examination guide the next step.

Can an older adult sleep after a head injury?
Sleep is allowed after a health service has said home care is appropriate, unless the discharge instructions say otherwise. A responsible adult should stay for the first 24 hours and seek emergency help if the person becomes abnormally difficult to wake.

Is observation finished after 24 hours?
No. The first 24 hours are a focused supervision period after home discharge, while some concussion symptoms can appear over days and chronic subdural hematoma symptoms can emerge weeks or months later.

Should an anticoagulant be stopped after the injury?
Not on a caregiver's decision. The medicine name and last dose time should be reported immediately, and a clinician should decide whether treatment continues, pauses or changes.