a shot in the arm
something inspiring or encouraging, a boost of energy
My job search got a shot in the arm when the company president called me for an interview.
Benefits of Hair Straightening
Always practise caution when using hot irons
Remember to work as efficiently as possible to avoid damage to the hair. Try using single passes with a high heat setting, or multiple passes with a low heat to achieve the best results for different hair types. Always practise caution when using hot irons, and avoid straightening hair more than a few times each week.