5'9 20y.oBA,All women have axillary fat pads and the volume of the fat pads also may reflect body fat levels. However, some thin women do appear to have excessive fat in the axillary fold region. The photo of you does not seem to show excessive fat, but the shaped strapless bra you are wearing is compressing just below the fat pads and accentuating their bulge. The photos you copied either show excessive axillary fat (beyond the average amount), or presence of ectopic axillary breast tissue that makes the area even more prominent, and can actually respond to hormone stimuli, e.g. pregnancy. Position of breast bases on the chest wall also has a bearing, as low breast position leads to a longer transition from the axillary fat pad to the breast tissues, making the pads more distinct. Higher positioning of the breast bases shows more blending of the axillary fats pad with the upper breast poles. Placement of implants usually fills the transition area from axillary fat pad to breast, and makes those fat pads less noticeable, but again the starting point anatomy plays a significant role. The slide show video that I linked below show before and after results of many patients with breast bases at various levels on the chest wall, and in each of the results the axillary fat pads become less apparent. If the fat pads are excessive, liposuction can help, even with axillary breast tissue, which can be reduced with special cutting liposuction cannulas. I hope that this helps.Best wishes, Tom DeWire, MD, FACS Richmond, VA