Spider-Man’s ‘spider-sense‘ manifests in a tingling feeling at the base of his skull, alerting him to personal danger in proportion to the severity of that danger. For instance, a little tingling such as a happenstance passing by of an enemy would prompt Peter to be alert, while a strong tingling, sometimes to the point of being painful, is interpreted as a need to take immediate evasive action.
Spider-Man can choose to ignore his spider-sense, and distraction or fatigue can cause decreased unawareness. Spider-sense is depicted in most comics as wavy lines appearing around Spider-Man’s head; when he is unmasked, this effect is sometimes accompanied by a symbolic half-mask appearing on his face. In the 90’s cartoon, negative colored shapes appeared around him.
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