Why is it bad to take hot shower after concussion?

Taking a hot shower after a concussion can worsen symptoms such as headache, dizziness, and nausea. The heat can increase blood flow and potentially exacerbate swelling or inflammation in the brain. Additionally, the relaxing effects of a hot shower may lead to increased fatigue, which can hinder recovery. It's generally recommended to avoid hot environments and seek cooler, more stable conditions to support healing.