Drainage may be from allergic reaction to ointment
Thanks for your question. The images are very magnified and it's hard to discern exactly what is happening. It could be that if you are using a topical ointment like Neosporin, that you have a sensitivity to it. The hardness and firmness you are describing however can be seen with excessive swelling or lack of blood supply to an area. If your breasts and nipple/areolar complexes are otherwise not swollen, and your surgeon doesn't appreciate any issues other than the skin weeping- it is likely a contact dermatitis. Not sure why it's only on one side. Dermatologist might be helpful too. Best of Luck!
Still draining post lift/aug
From your photos i would bet that this is due to some retained sutures and given time your surgeon can remove them or they will fall and or absorb.Make sure you have no fever.