Tattoos  have since been a form of art and self-expression even from  the  earliest centuries. It also represents a person's characteristic  and  how he perceives himself/herself to be. In the past, only the  warriors  of a tribe had tattoos. This was to show what they have been  through.
The  tattoos of today represent or are in a way, a  representation of the  tattoo designs of the past. There are tribal  tattoo designs, Celtic  tattoos, and Goth tattoos. But out of these three  tattoo designs, type  or class of tattoos; people look to the Celtic  tattoo designs for  symbolism from artwork. These Celtic designs are  difficult to decipher  on what they really mean.
The  most basic and  fundamental key elements of Celtic design tattoos  include spirals,  knots and crosses, and even hearts. Most commonly, a  heart is made with  spirals, knots and crosses. A Celtic heart tattoo is  requested and even  chosen by people who feel a strong emotion which is  love. Thus, the  heart tattoos symbolize love, charity, and compassion.
The  fresh  and modern Celtic heart tattoo is understood as a symbol of love  and  faith as a person journeys in his life. If there are spirals on  the  design, a spiral open on the right side, it means it moves in the   clockwise direction and is thought of as a sign of good luck. Once the   spiral is open to the left, in a counter clockwise direction, it means   you are in harmony with the Earth. Another thing to be noted is the   number of spirals in heart tattoos. Three spirals signify the Holy   Trinity and four represent the four directions: north, south, east and   west.
One of the most common  Celtic heart tattoo designs is the  Claddagh. It is represented by a  heart that is gently clasped or held  between two hands or with a crown  on top. This design is a symbol of  loyalty and love and is popularly  seen and found in jewelry designs,  especially in rings and sometimes in  pendants. There are several types  of Claddagh designs that have both  subtle and not so subtle variations.
If   there is a knotwork on the tattoo design, it is thought of as a symbol   of never ending love. Thus, it also shows the strong emotion of love.
There   are people who choose these designs because they show the meaning of   love and romance. In the past, lovers get Celtic hearts as tattoos to   show their devotion and love for each other. Women often choose small   Celtic hearts with spiral design tattoos or just a plain heart. For men   however, they choose a bolder, more colorful and vibrant approach. They   mix hearts and crosses, as well as spirals with knotworks. The   possibilities with these designs are endless. With the combination of   the basic elements of Celtic design, your heart tattoo will become more   meaningful.
These tattoos can  either be in the typical black and  white color scheme which suit these  designs best or for a bolder  approach, colors could be added.