Hi
Those are elemental wind bars and have been placed in the tattoo as air fuels fire.

Traditional wind bars tend to be very blocky and solid fill or can be slightly curved as in the tattoo but again with solid fill.

If you were to go more modern you could do a lighter fill version or ones that flow like water away from the skin.

The direction of the wind bars was usually dictated by the scene so for example if you had water it would be sweeping away from the flow of the current. Or if say a dragon breaking against the flesh of the body.

Take care
Matthew