Hi, I would suggest that you advise your boss that you are having elective, intrusive surgery, which is the reason behind your annual leave and that on your return, due to the nature of your surgery, you may need to alter your duties for a fixed period. I would suggest that you visit your GP before you return to work and request a sick note identifying that you are fit for work on amended duties. Your GP will do this without question and they will identify the length of time for your amended duties on your sick note. This is totally reasonable and your place of work should consider these suggestions. Your not obliged to tell your boss what surgery you had yet you have provided substantial considerations for your return to work. X