nodules
"symbiotic"
These bumps are called nodules
Fixed nitrogen refers to nitrogen compounds that have been converted from atmospheric nitrogen by bacteria or through industrial processes, while free nitrogen refers to nitrogen gas (N2) that exists in the atmosphere in its elemental form. Fixed nitrogen is more readily available for use by plants and animals, while free nitrogen is inert and must be transformed into a usable form before it can be utilized.
Your skin could be irritated from the bacteria that's in the water.
maybe a type of skin rushes or a contaminated water(with bacteria) or a allergy..
the bumps appears because of the bacteria or any bad microorganisms that the insects had inserted inside our body. or maybe they have the fluid inside their body that makes our skin itchy or get irritated.
Bumps
flat without bumps
Heat bumps.
We used to give our mates 'bumps' on their birthdays.
Lent Bumps was created in 1887.