As Hinduism is the oldest religion on the earth, it has more numbers of symbols than other religions. Each Hindu symbol has a different meaning and is used on different occasions.
That is what the three parts of Om (or Aum) represent. It is combined with the om and Trishul that reflects deep consciousness and power. Trishul is the main weapon of Lord Shiva which he always carries with himself and is highly revered in Hinduism. Chanting Om is said to unify the chanter with the universe while slowing the body and calming the mind.
This has inspired by the artists due to its wide meanings and the beautiful symbol. The syllable of this word is the first sound of life that is used in variations by a many tattoo artist.
Every religion has its own symbols to represent worship to their God and Goddess. Most of us feel a deep connection with this symbol and then decided to choose Om tattoo on our body parts, which will be the reminder of our inner peace and harmony.
Mainly Om tattoos can be found with Trishul, Ganesha, elephant, snake, and some traditional prayer and quotes.