The sucking reflex appears between 0 and 3 months of age, and the infant will suck when something is placed in the infant’s mouth. It disappears on its own 3-4 months after birth and is gradually replaced by active feeding movements. However, during sleep and on some other occasions, infants still show spontaneous sucking movements for a period of time. A positive sucking reflex is indicative of a cortical disorder if it persists after 1 year of age. The presence of the sucking reflex in non-childhood is most often seen in frontal lobe lesions, pseudobulbar palsy . A positive sucking reflex indicates the presence of a disease that can be a serious health and life threatening condition. Here is a look at what tests should be done for patients with a positive sucking reflex in order to receive better hospital treatment. Through the following introduction, I believe you will have a certain understanding of what tests should be done for patients with a positive sucking reflex, and I hope it will be of some help to you. 1.Cerebrospinal fluid examination. 2.CT examination of the head. 3.Cerebral angiography. 4.Brain ultrasound examination. 5.Electroencephalogram.