- The signs of shunt malfunction are similar to the signs of hydrocephalus: - the signs of shunt blockage and disconnection are the same as in hydrocephalus - if an infection is present the patient will also have signs of systemic inflammatory response - Symptoms related to overdrainage (headache, tiredness, vomiting) are usually worsened by an upright position and therefore become prominent towards the evening. Adult hydrocephalus and shunt complications included.