<unk>  or exacerbation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of<unk>  is an irritant. Irritants are typically thought of as chemical agents (for example phenol and capsaicin) but mechanical, thermal (heat) and radiative stimuli (for example ultraviolet light or ionising radiations) can also cause<unk> .<unk>  also has non-clinical usages referring to bothersome physical or psychological pain or discomfort.
Irritation
Somatization
Pungency
Overeating
Hyperesthesia
Constipation
Constipation  
Andropause