LUCINDA GITURA MUGAA2026-05-042025-02https://repository.tangaza.ac.ke/handle/123456789/1601Gigantomastia is one of the breast abnormalities that affect women globally. It is characterized by massive breast growth which inconveniences the people having the condition due to the excessive weight. The women with this condition are subjected to stigma, rejection, and isolation. Studies on this topic have been conducted particularly in the field of clinical medicine in Western Countries and some parts of West Africa. The findings of these studies revealed a lack of awareness of the condition despite its physical, psychological and social impact on women. This position can be replicated in Kenya because there is no empirical study published on gigantomastia apart from scanty information captured in gray literature. The study aimed to understand the physical, psychological and social effects of gigantomastia on the mental health of women in Nairobi County -Kenya. Cognitive adaptation theory was used in this study. The research adopted a descriptive research design. Snowball sampling technique was used to obtain the sample size. The respondents included women located in Nairobi County. The sample size consisted of 50 participants drawn from Nairobi County in Kenya. Data was conducted using an interview guide. Qualitative data was analyzed by the use of thematic analysis and presented in themes related to the study objectives. The findings of the study indicated, the physical effects of gigantomastia were; large and heavy breasts, physical pain, challenge getting appropriate clothes, challenges doing physical activities and posture. The psychological effects were; self-esteem and negative body image, intense negative feelings and emotions, loss of interest of social activities and unhealthy coping mechanisms. The social effects were; difficulties with social interaction, labelling and social stigmatization, body images and sexualization issues and social support. The beneficiaries of this study will include the parents, scholars/researchers, medical practitioners/psychologists and the Ministry of Health. The study recommends establishment of multidisciplinary approach to support women living with gigantomastia to improve the quality of life. It suggests areas for future studies such as the impact of gigantatomastia on the academic performance of adolescents and its effects on the maternal health of women from the Kenyan context.enThesis