Half of the right necrotic brain implies severe brain function impairment, which may result in impaired consciousness, impaired cranial nerve function, limb motor and sensory dysfunction and other symptoms. 1. Impaired consciousness: half of the right brain necrosis means extensive cortical function damage, and patients may have impaired consciousness manifested as drowsiness, lethargy, coma and so on. 2. Impairment of cranial nerve function: patients may have crooked mouth and eyes, hearing loss, choking on drinking water, difficulty in swallowing, etc. 3. Limb motor and sensory dysfunction: manifested as left limb muscle strength loss, left limb sensory loss, etc. 4. Others: emotional abnormality, mental abnormality, memory loss, phantom smell, etc. may also occur. Half of the right brain necrosis needs immediate consultation and treatment in regular hospitals to avoid aggravation of the condition.