I seen nights full of pain, days are the same
“Days are the same”, may be a reference to his prison time served. In prison, days may feel the same due to the claustrophobic nature of prison, especially with Lil Wayne use to flying to new and exciting places on a weekly basis.
Also, he experiences Pain at night and days are the same as night — meaning he experiences Pain 24/7. Lil Wayne is talking about his nights of pain due to health issues in recent times, after multiple seizures in-flight, in which emergency landings had to be performed.
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