Ingstorms are swarms of minuscule Ing forms that attack in large numbers. The Ing usually use them to guard areas that need to be accessible, but also strictly defended. Individually, these small Ing particles cause about as much damage as a pinch. But banded together, they emit a destructive energy can corrode even the strongest known alloys. Since Samus' Power Suit is made of one such alloy, these Ing will rip right through the armor, even when equipped with the Dark Suit. Simple exposure to the energy created by these clusters of Ing is extremely lethal, as evidenced by the scan of two Luminoth corpses found near an Ingstorm in Reliquary Access.
One of the few ways to pass through the "storm" of Ing particles without being dealt damage is to acquire the Light Suit. Ingstorm particles turn red and bounce away when they collide with the Light Suit. However, if Samus is able to jump correctly, she can also utilize the Screw Attack to simply fly right through the Ingstorm without the protection of the Light Suit.