Skull tattoos are symbolic of mortality, transformation, and the cycle of life and death, often representing a person's acceptance of their own mortality and the impermanence of life. In some cultures, skulls are also seen as a symbol of protection, strength, and spiritual growth, signifying the wearer's ability to overcome challenges and emerge stronger. Overall, skull tattoos embody a complex and multifaceted meaning that varies depending on the individual's personal experiences and cultural background.