The height of the breasts is affected by the position of the shoulders.  The muscles of the chest known as pectoralis minor and pectoralis major tend to rotate the shoulder inward and downward.  The opposing muscles of the back such as the rhomboids tend to pull the shoulder backward.  The theory is that if the muscles such as the pectoralis minor were weakened, this would result in unopposed movement of the shoulder upward and backward, thus lifting the breasts to a more prominent and esthetically pleasant position. This is the basis for the botax breast uplift procedure.

The fact that this works is proven in tests where the pectoralis minor on each side is given a botox injection dose of about 30units of botax (more commonly known as botox).  Botax weakens the pectoralis minor muscles and the breast uplift occurs as a result.  A somewhat pleasant side effect as yet unexplained is the stimulation of the nipples which remain erect for a month.

Breast Uplift With Botax - Before

Breast Uplift With Botax - After

The botax effect lasts about 3 – 4 months.  It is noted that the breast up lift effect is more obvious in people with slightly smaller breasts, about cup size A or B.  Upon wearing out of the effect in about 4 months, the breasts start to descend, and it is time for a repeat dose of botax.