The bite of the viper has two small holes that are about 1 cm from each other. However, it is not always possible to distinguish the exact point of the bite, since this can be inflicted with only one venom tooth (only one hole is detectable if the snake has previously lost a tusk and has not yet well developed the new replacement element) . In addition to the holes in the inoculation point, it is possible to find, in more or less parallel lines, also the imprints left by the other maxillary teeth of the reptile.
It is easier to notice the bite of a viper due to the great pain it feels, associated with the rapid appearance of a hard local swelling. The victim has small bleeding in the injured area, followed by dizziness, nausea, vomiting, abdominal pain, dyspnea, severe hypotension and tachycardia, difficulty in movement and loss of consciousness. The state of shock can culminate in disorders of coagulation and circulatory collapse, sometimes fatal. It should however be pointed out that very rarely the bite of a viper is fatal for a man of normal and healthy constitution.