The image appears to show small aquatic larvae in standing water inside a toilet bowl. These are commonly known as mosquito larvae, the early life stage of a Mosquito. When mosquito eggs hatch, the larvae live in still water until they develop into adult mosquitoes.
Why this can happen
Mosquitoes lay eggs in stagnant or rarely used water. If a bathroom fixture—such as a toilet, drain, or tank—is not flushed or cleaned regularly, it can provide a temporary breeding place. In warm environments, the life cycle can be quick:
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Eggs are laid on or near water
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Larvae hatch and live in the water
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They develop into pupae
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Adult mosquitoes emerge
This process can take about 7–14 days depending on temperature and conditions.
Common signs of mosquito larvae in water
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Small worm-like creatures that wiggle when disturbed
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Clusters of larvae near the water surface
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Water that has remained still for several days
What to do
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Flush the toilet several times to remove the larvae
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Clean the bowl and tank with disinfectant
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Ensure bathrooms or drains are used or flushed regularly
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Remove any other sources of standing water nearby
Situations like this are not a sign of something “growing inside a person”, as some viral posts claim. Instead, they usually indicate that insects found a place with still water where they could lay eggs.
Regular cleaning and preventing stagnant water is usually enough to stop it. 
