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These drugs help lower levels of unwanted blood cholesterol and may be helpful if given soon after a heart attack to improve survival . Moreover , some elements of a set may be larger in value than others , or they may exhibit some other relationship that allows you to rank them or put them in order . Another such avenue is the use of data-mining techniques , applied to electronic sales data now readily available to most retailers , to assess how sales of one product influence those of another in a different category and , hence , affect total profitability . People with severe or chronic tension headache may require stronger painkillers or preventive medications to reduce the frequency and severity of head pain . Skinner said he had recently spoken with Coast Guard Commandant Thad Allen , who Skinner said has taken the critique seriously and has reorganized his staff , named a new assistant commandant to oversee the program and rewrite the contract . Some people who pull out their hair say that a particular color , such as gray hairs , a particular shape , such as curly hairs , or a particular texture , such as coarse hairs , triggers an urge to pull out those hairs .