Avatar photoRomain R

Romain R., known as 'The Nut,' is MattressNut's founder and research lead, with over 10 years in the bedding industry. He specializes in mattress materials, coil and foam construction, and long-term durability, and runs MattressNut's hands-on Sleep Lab testing. Romain fact-checks every review against manufacturer specifications and real-world testing before it publishes.
best mattress for petite side sleepers

Why Do I Wake Up at 3am? (2026)

Waking up at 3am? It's usually normal sleep cycles lightening, plus stress, temperature, blood sugar, or age. Here's why it happens and when to see a doctor.

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