When we talk about the Ethereum blockchain, we must keep in mind that for each wallet there are two addresses, a public one and also an "internal" one.
In general we are familiar with public addresses (external) or those known to most people (starting with 0x...).
All the activity of the blockchain Ethereum is done through external addresses that make transactions. Internal addresses, however, are used "behind the scenes" to transfer value through the initialization of smart contract, without going through the blockchain. This is done through the "message" function which today, by convention, has been renamed "internal transaction".
The term "internal transaction" is actually improper, because internal transactions are not included in the blockchain. On the contrary, they can be considered the product of smart contract functionality. These "internal" transactions are not visible in the transaction history, but in a dedicated section called "internal transactions". The most important thing to know is that the ETHs transferred in this way are reflected in the overall balance sheet of your wallet.
By entering your Ethereum address on Etherscan, you can view them in the "Internal transactions" tab. Through Eidoo it is not possible to directly consult the internal transactions in the transaction list.