I would say it may be a dermatologist 
        
             
        
        
        
<span>True, the average menstrual cycle does indeed last around 28 days. This varies between women, however, and can range from between 21 and 35 days after puberty. The menstrual cycle is controlled by fluctuating hormones in the female body.</span>
        
             
        
        
        
Cocaine abuse can have neurological effects such as abusively fighting someone and much more factors that are bad that can really hurt someone deeply.
        
             
        
        
        
Neurotransmitters? im not 100% sure