This is a Confusion icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,600 icons, all in the same style and quality.
The image is a person's bald head. The person is facing the right and doesn't have a mouth or eyes. The person also doesn't have ears but there is a question mark on the person's head where the ear would be.
Related to Confusion Icon
Related icons are the icons with matching tags, as well as all healthcare icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors