Overview

• Studies cited put smartphone addiction at roughly 25% globally, with 71% sleeping next to their phones and 74% charging them in bedrooms.
• Sleep specialists warn that notifications and vibrations trigger micro‑arousals and blue light suppresses melatonin, cutting REM and deep sleep.
• Safety concerns include overheating and fire risks, with one survey finding 11% charge phones under pillows and cautions over unofficial chargers that may flout standards.
• Reports highlight hygiene hazards, noting phones can carry heavy microbial loads that transfer from bathrooms and public transport into beds.
• An NHS GP says phone radiofrequency is non‑ionising and large epidemiologic studies do not show a clear cancer link, while advising distance from the bed, Do Not Disturb, and avoiding overnight charging.