Pain is subjective, and everyone's pain tolerance varies. In general, both Flash and Custom tattoos involve a level of discomfort since the process involves a needle penetrating the skin. The pain level depends on factors such as tattoo placement, individual pain threshold, and the complexity of the design rather than whether it's Flash or Custom. However, Flash tattoos are often smaller and less intricate, which means the tattooing process may be quicker, resulting in potentially less overall discomfort.