The brain contains many billions of neurons that work together to produce sensation, thought, learning and many other sensing and feeling type of processes.
Neurons use electrical signals to transmit information within a single cell and these unique functions have forced the neuron to adopt a cell structure.
Neurons comprise a cell body (or soma), dendrites, and an axon that ends at a terminal. Communication between neurons is a chemical process that uses neurotransmitters.
There is no cure to it but people can take treatments to get better from it. Some include antidepressants and therapy
Sharing needles can along with many other ways.
To stabilize the other elements