Autistic people can be hyperreactive or hyporeactive to sensory input. They might be indifferent to temperature or pain (hyposensitivity) or be adverse to certain smells, sounds, textures, or touch (hypersensitivity). Every single autistic person is different, and one person can have both hypersensitive and hyposensitive reactions.
This can seriously impact sleep quality. For me, this means that I can’t fall asleep with any kind of light or noise because I’m hypersensitive to both. I use earplugs and an eye mask to tackle this. But, I’m hyposensitive to touch, so I use a heavy blanket every night. A heavy blanket weights 10–15% of your weight and it has been proven to be effective with anxiety.