Why does brain fog feel more mental than physical?

Short answer
Brain fog mainly affects mental energy.

What’s usually happening
Cognitive load can feel like exhaustion even when the body feels capable.

What this is usually not

• physical weakness

• illness by default

Common reasons

• mental strain

• long periods of concentration

• lack of mental rest

What usually helps

• mental rest

• switching tasks

• time

When to pay attention
If mental fog persists regardless of rest.

If your brain fog feels different, return to main brain fog page.