If you've ever considered taking on a PhD, then you'll know that it's a long and demanding process. Dr Laura Valadez-Martinez talks about seven types of problem that may emerge during a PhD, including:

1. Getting stuck during your PhD.
2. Remaining focused throughout the PhD.
3. Motivational problems that arise during the PhD.
4. Memory problems due to the enormous amounts of things to remember.
5. Maintaining relevance in your PhD research.
6. Feelings of being alone.
7. Not knowing what's next.

This TED talk explores how a PhD could be more difficult than initially expected. It offers ways to overcome those issues and enjoy the learning process.