It is not uncommon to have multiple issues. However, within a standard consultation, there is not enough time to address all of these issues and that the time taken to deal with these issues properly would cause delays for other patients.
There is also the issue of short-term memory. Short term memory can hold 7 (plus or minus 2 items) because it only has a certain number of "slots" in which items could be stored. When a doctor tries to deal with multiple issues, the majority of the instructions or plans are forgotten leading to bad patient management.
What can be done about this?
If you have more than two issues, kindly book in for another follow-up appointment. Alternatively, inform the receptionist that you would like a long consultation so more time can be added into future consultations.