What everybody else said ---- but sometimes it has taken months for me to completely heal.
It depends on where you get it, how it was done, health,medication, if you were leaning against something that irritated it, so many things could factor in to it - however 6 days is still so early.
Continue healing it the way you have your others.
See how it is then.
Many of my tattoos, on different areas of my body, at different times, occasionally only partially or in their entirety raise/ and or itch.
Take a little benadryl --see what happens.