Pains to pick up with lots of facial hair? (10)

'pains' is the definition.
The answer and definition can be both feelings as well as being plural nouns.
Perhaps there's an association between them I don't understand?

'pick up with lots of facial hair?' is the wordplay.
'pick up' becomes 'hear' (synonyms).
'with' means one lot of letters go next to another.
'lots of facial hair?' becomes 'taches' (I can't justify this - if you can you should give a lot more credence to this answer).
'hear'+'taches'='HEARTACHES'

'to' is the link.

Can you help me to learn more?