Art therapy in breast cancer can be considered as one of the complementary interventions in the field of psycho-oncology, which aims to support psychological adjustment, emotion regulation, improve body image, and improve the patient's quality of life. For many women, breast cancer is not just a physical disease, but a complex experience that can affect a person's sense of security, identity, femininity, self-concept, and relationship with their body. The process of diagnosis, surgery, chemotherapy, radiation therapy, and hormonal therapies may be accompanied by several physical changes, and these changes may lead to anxiety, depression, decreased self-confidence, concern about appearance, and disruption in social and emotional relationships in some patients. From this perspective, art therapy tries not only to examine the experience of the disease at the level of medical symptoms, but also to consider its emotional, cognitive, social, and identity dimensions. The theoretical basis of this approach is based on the view that human emotional experience is not always limited to verbal language, and that many of the fears, conflicts, losses, and complex emotions may be more easily expressed through imagery, color, form, movement, and other forms of creativity. In breast cancer, this feature of art therapy becomes especially important, as part of the patient's psychological suffering may be directly related to the body and its physical changes. Breast surgery, body reshaping, scarring, hair loss, weight changes, and skin changes can alter the person's image of their body before the disease, creating a distance between the real body and the desired body. In some people, this gap can lead to body dissatisfaction, avoidance of body observation, feelings of shame, or a decrease in feelings of attractiveness, and in some cases, it can also affect interpersonal relationships and quality of life. Art therapy can help the patient observe and reflect on their experience of the changed body by providing the opportunity to represent the body. Painting, drawing, collage, and illustration can symbolically reveal the patient's experience of the body before the illness, the body during treatment, and the body after treatment, and provide a platform for dialogue about the emotions associated with these changes. The goal of this process is not to create forced acceptance or unrealistic positivity of the disease, but to create an opportunity to recognize and process the patient's true experience. One of the important mechanisms of art therapy is to facilitate emotion regulation. A patient with breast cancer may experience feelings of fear, anger, sadness, frustration, worry, and hope at the same time, and sometimes they may not be able to express these conflicting emotions verbally. Artistic activity can allow a person to externalize these emotions in a tangible and visible way and to communicate more closely with their inner experience through dialogue about the work. Such a process can help increase emotional awareness and reduce the avoidance of difficult emotions. Psychologically, increasing awareness and the ability to name or represent emotions can be one of the important stages of emotion regulation. In some studies conducted in the field of breast cancer, art-based interventions have been associated with a reduction in symptoms of anxiety and depression, and these findings suggest that creative activity can reduce some of the emotional burden of the disease, along with other psychological interventions. However, this effect is not the same in all patients, and factors such as the stage of the disease, type of treatment, individual characteristics, social support, and the severity of psychological problems can affect the patient's response. Anxiety in breast cancer may persist at the time of diagnosis, before surgery, during treatment, and even after the end of treatment, and concern about the recurrence of the disease is one of the important factors. Art therapy can distract the patient's attention from threatening thoughts for a while by creating a structured and purposeful activity, allowing him or her to actively participate in a creative process. The experience of choosing the color, shape, subject, and manner of execution of the work can foster a sense of agency, as illness and treatment may have diminished a person's sense of control over the body and the future. In such a situation, the experience that the patient can make decisions in a given process and influence the outcome may be psychologically important. Depression can also be associated with decreased motivation, social withdrawal, feelings of worthlessness, and decreased participation in daily activities. Artistic activity, if properly designed, can create an accessible and meaningful activity, giving the patient the opportunity to re-experience success, participation, and connection with others. In group activities, art therapy can provide social support in addition to individual expression. Connecting with women who have similar experiences may reduce feelings of isolation and difference, and increase the possibility of exchanging experiences and coping strategies. However, not all patients have the same tendency to group activity, and in some situations, individual intervention is more appropriate to process issues related to the body, femininity, or intimate relationships. Another important area is the restoration of self-concept. When a person has defined a significant part of their identity by appearance, social role, femininity, or physical ability, the changes caused by cancer can challenge the previous structure of self-concept. Art therapy can help the patient recognize elements of their identity beyond physical appearance and reintegrate characteristics such as values, relationships, abilities, goals, interests, and social roles into their narrative. This process can prevent the person's identity from being limited to the concept of a "cancer patient." This is also important in the post-treatment period, as the end of medical treatment does not necessarily mean the end of the psychological consequences of cancer. Some patients continue to face fear of relapse, anxiety about their bodies, and difficulty returning to normal life after completing treatment. Art therapy can help reconstruct life narratives, redefine goals, and make a link between the experience of illness and the continuation of life. Quality of life is also one of the most important outcomes to consider in evaluating these interventions. Quality of life is a multidimensional concept and includes physical health, mental state, social relationships, daily functioning, a sense of independence, and overall satisfaction with life. Reducing anxiety or depression can be one of the possible pathways to improving quality of life, but it should not be assumed that any change in emotional state necessarily leads to an improvement in all aspects of quality of life. Therefore, the evaluation of art therapy should be multidimensional and in addition to psychological indicators, it should also take into account body image, fatigue, sleep, social functioning, and life satisfaction. In clinical application, art therapy can be used from the time of diagnosis to the survival period, but the goal of the intervention should change according to the stage of the disease. In the diagnosis phase, it is important to focus on reducing distress and facilitating the expression of emotion; in the course of treatment, adaptation to physical complications and body changes becomes more prominent, and after treatment, rebuilding identity, body image, and returning to social roles becomes more important. The collaboration of the art therapist with the psycho-oncologist and the medical team can allow for a more comprehensive assessment of the patient and the choice of intervention tailored to their needs. Despite the significant capacities of art therapy, there are also limitations that need to be considered in the interpretation of the evidence. Different studies have used different techniques, number of sessions, and implementation practices, and this heterogeneity makes it difficult to compare results. Differences in the type of cancer, stage of disease, type of surgery, and treatment can also affect the outcomes of the intervention. Some studies have limited samples or a short follow-up period, so it is not possible to draw conclusions with certainty about the sustainability of the effects of the intervention. It is also difficult to separate the specific effect of the artistic activity from the effect of the therapist's attention, social support, and human connection in art therapy sessions. Another challenge is that works of art should not be interpreted in a simple and definitive way, and no image or painting alone can be the basis for psychological diagnosis. The meaning of the work should be extracted from the patient's own experience and narrative, and the therapist should avoid imposing personal interpretation. Future research can more accurately investigate the effectiveness of art therapy in different dimensions of breast cancer with larger samples, controlled designs, long-term follow-up, and the use of standard protocols. Also, simultaneous examination of emotion regulation, body image, self-concept, anxiety, depression, quality of life, and social adjustment can create a more comprehensive picture of the outcomes of the intervention. Overall, art therapy, as a complementary intervention in breast cancer, can create a link between the physical experience of the disease and its psychological experience, and help the patient to adapt through emotion expression, body representation, agency reinforcement, identity reconstruction, and social support. The main value of this approach in paying attention to the body at the same time is emotion, emotion, and identity, because a woman with breast cancer is not only facing a physical illness, but may also need to reorganize her relationship with her body, self-image, and the meaning of life after the disease. Art therapy in this way can provide a space in which the experience of illness is expressed in the language of images and creativity, difficult emotions are observed and processed, and the individual has the opportunity to reconstruct his or her identity beyond physical changes.