Rechargeable massage gun. Not only does it feel great (and a lot cheaper than going to a masseuse) it provides deep tissue relaxation and pain relief.
There's multiple health effects, according to the Washington Post "Like a traditional massage, the gun aims to reduce inflammation by flushing extracellular fluids such as lymph fluid and venous blood out of the muscle tissue and into the circulatory system. It can help relax tight muscles, break up scar tissue and adhesions, and minimize muscle soreness and tension." Read the full article here