How long does it take for swelling on your forehead goes away after a hard hit on cement?

First, swelling is a good sign, it means fluid is not building up inside your brain. It may take several hours to decrease. Be aware of dizziness or slurred speech, this may be a sign of a concussion.

Based on personal experience, swelling on the forehead will go down after a day or two, but then the area around the eyes will swell as this is where the blood drains to. After about 4 days, the swelling will fade away.
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