Eleven bleeds from her nose because her powers are connected to the Upside Down.
The Upside Down Connection
Eleven's nosebleeds are a consequence of using her psychic abilities, specifically those that involve interacting with the Upside Down. The reference material highlights this connection:
Given that Eleven's powers have a strong connection to the Upside Down, with the ability to open and close gates, and that the dimension has a toxic effect on humans in some way, Henry Creel's transformation into Vecna essentially confirms that her abilities' Upside Down link is behind the Eleven nosebleed issue.
This suggests that the more intense her power usage, especially in relation to the Upside Down, the more likely she is to experience nosebleeds. The Upside Down's toxic influence, combined with the strain of her powers, manifests physically as nosebleeds.
Key Factors Contributing to Nosebleeds:
- Power Intensity: Overexerting her psychic abilities.
- Upside Down Interaction: Opening or closing gates and making contact with the dimension.
- Strain on Abilities: Using her powers for extended periods or at high intensity levels.
Understanding the Mechanism:
The exact physiological mechanism behind the nosebleeds isn't explicitly detailed, but it's reasonable to infer that using her powers puts a significant strain on her body. This strain, combined with the toxic effects of the Upside Down, likely causes blood vessels in her nose to rupture, resulting in the bleeding.
