The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
Why is it so tempting to pick a scab? Our bodies create them to help wounds heal, yet those same bodies make us want to remove them. Tabitha Stubbs, Liverpool
Send new questions to nq@theguardian.com.
More Stories
Microplastics found in human ovary follicular fluid for the first time
The truth about stress: from the benefits of the ‘good kind’ to the exercise that only makes it worse
The promise of diagnosis: how it can open a door to true self-understanding