Hanuman z the son of Anjana, an female Apsara who had been transformed into a monkey by a curse and Vayu, the wind God. It is also said that from his father Vayu, hanuman received the ability to fly.

As soon the son of Hanuman born he felt hungry and his mother could not satisfy him. Then he caught sight of the sun and thinking it was a fruit and leapt after it. The sun took flight bt Hanuman chased him as faras Indra’s heaven. However Indra intervened and injured Hanuman jaw with his thunderbolt.
But his father quick to avenge him and entered the bodies of all Gods and gave them colic. Indra apologised to Vayu and agreed that Hanuman should become immortal. All the Gods came together to bless young Hanuman in a cave.
As a young monkey God, Hanuman was quite naughty and abused his powers to pester the saints living in the nearby forest.
Finally all the Gods prayed to Brahma to find a solution. Thus a curse was created to pr0tect the world from the mischief that Hanuman created by removing his knowlegde of his power.
The power of Hanuman of which becoming big is just one example only became available again when Jambavant, King of the Bears, remembered Hanuman that he has that power.
And that power was really great Hanuman could easily fight an elephant and he could become much bigger than the elephant at will.
At the time of ramayana, Hanuman was send as an advance spy to Lanka. to reach there he need to fly over the sea but then he was blocked by Sursa, who wanted to test him. she had a boon that everybody who comes before her must pass through her mouth. However when she wanted to swallow hanuman, he become bigger and bigger so she also become bigger and bigger. Then Hanuman suddenly become very small and went into her ear and come out from her mouth, thus fulfilling the boon.
In the Ashokavatika or forest of Ashoka trees on Lanka. Hanuman spy on Ravana, who is trying in vain to press Sita becoming his wife. Later h contacted Sita in the garden of Ravana’s palace, told her about the plans that are being made for her delieverance and gave Rama’s signet ring as a token.
Pleased with his success, Hanuman faught the demon Meghnaath, son of Ravana in the garden of the palace of Lanka. He won over Meghnaath, but was finally captured by Ravana’s demon.
Brought before the demon king, Ravana ordered that while as a messenger of Rama he could not be killed, his tail could be set a fire with cloth and oil. But Hanuman used his power to enlarge his tail indefinitely ubtil the demons had no cloth left to cover it. while they still try to put the fire to his tail, Hanuman become small and escape from the ropes.
Trailing his burning tail behind him, Hanuman then set fire to all Lanka and flew back to the mainland. He rejoined Rama and gave him valuable information on Ravana’s forces. The army crosses a bridge to Lanka that was made by another leader and master architect, Nala.
During the mighty battle that followed, Hanuman defeated the demon Lankini, who was the principal guard of the city of Lanka.
Hanuman’s greatest feat during the battle of Lanka however was bring back the herb that cured Lakshman from a fatal wound. He flew all the way to Himalaya’s to find it. Harassed by many demons such as Kalanemi. Because Indra was confusing him, Hanuman could not find the herb and fnally brought the entire mountain to Lanka.
Ravana was defeated by Rama. Rama and Sita Dewi wer crowned as king and queen of Ayodhya. Obviously Hanuman was present remained Rama’s favourite general and continued his life in service to him. When Rama offered him any boon that he cared his name and he asked to lived for as long as men speak of the deeds of Rama.
JaI HaNuMaN!!! <3