CV4 cranial treatment is a gentle, indirect cranial technique that aims to influence the cranial rhythmic impulse and autonomic balance. The safety concern here is avoiding any manipulation when there is acute injury to the head. An acute head trauma, such as a skull fracture or intracranial bleed, is a contraindication because applying cranial pressure or performing the technique could worsen bleeding, raise intracranial pressure, or displace fragments, risking further brain injury or herniation. For this reason CV4 should be avoided in the presence of an acute head injury. The other listed conditions do not involve an acute cranial injury or instability, so they do not automatically preclude CV4; seasonal allergies, mild dehydration, or appetite loss are not contraindications by themselves, though the overall clinical picture should always guide any manual therapy.