Treatments will very much be based on the underlying cause of the sensory disturbance, the first step is to make a diagnosis of the sensory disturbance.
Investigation of sensory nerve abnormalities may involve neurophysiological tests, such as nerve conduction studies (NCS) where electrical stimuli are applied to individual nerves and the amplitude and speed of conduction is then measured.
Electromyography (EMG) is another technique, where small needles are inserted into particular muscles to detect alterations in electrical activity. Whilst these tests may sound unpleasant, in the correct hands they merely feel a little uncomfortable or simply strange. Other investigations are imaging of the brain and spinal cord and blood tests for common causes such as diabetes, thyroid and vitamin deficiencies.
Conditions such as trapped nerves, e.g. carpal tunnel syndrome, may respond to physiotherapy but sometimes need surgery, whilst neuropathy will need treatment of the underlying cause such as vitamin deficiencies.
Ultimately, sensation is part of normal human experience and for many people, unusual sensations arise not from any physical abnormality but rather from a psychological shift in perception.