Sore spots (5)
(Other definitions for boils that I've seen before include "Brings water, say, to 100 degrees Celsius" , "Seethes" .)
'sore spots' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aches that I've seen before include "sign of suffering" , "Dull prolonged pains" , "discomfort" , "Continuous pains" , "Dull persistent pains" .)