Ingrowing
/ˈɪnɡrəʊɪŋ/
Definition 1 of 1
Pro Tip 1/3Medical Context
Used to describe abnormal tissue growth, often painful and requiring medical attention. 
She saw a podiatrist about her ingrowing toenail.
Pro Tip 2/3Physical Discomfort
'Ingrowing' implies a level of physical discomfort or problem that might worsen over time. 
He complained of discomfort from an ingrowing hair under his chin.
Pro Tip 3/3Common Misuse
Don't confuse 'ingrowing' with 'growing in'; 'ingrowing' specifically refers to problematic growth. 
It's not just growing in, it's an ingrowing eyelash that's irritating my eye.