A physical examination may follow where a doctor may tap lightly on the skin to determine how much feeling is present. Depending upon the location of the symptoms occurring, a doctor may recommend some tests to determine the overlying cause of the hypoesthesia. These tests include imaging computerized axial tomography (CT) and magnetic resonance imaging (MRI) scans, nerve conduction studies to measure electrical impulses passing through the nerves in search of damage to the nerves, and various reflex tests. An example of a reflex test would be the patellar reflex test. Treatment
Treatment of hypoethesia are aimed at targeting the more broad disease or illnesses that has caused the side effect of sensation loss. See also
Anaphia
Dysesthesia
Hyperesthesia
Paresthesia
Raynaud syndrome


== References ==
Descending perineum syndrome (also known as levator plate sagging) refers to a condition where the perineum "balloons" several centimeters below the bony outlet of the pelvis during strain, although this descent may happen without straining. The syndrome was first described in 1966 by Parks et al. Signs and symptoms
Abnormal descent of the perineum may be asymptomatic, but otherwise the following may feature:

perineodynia (perineal pain) 
Colo-proctological symptoms, e.g. obstructed defecation, dyschesia (constipation), or degrees of fecal incontinence
gynaecological symptoms, e.g. cystocele (prolapse of the bladder into the vagina) and rectocele (prolapse of the rectum into the vagina)
lower urinary tract symptoms, e.g. dysuria (painful urination), dyspareunia (pain during sexual intercourse), urinary incontinence and urgencyOther researchers concluded that abnormal perineal descent did not correlate with constipation or perineal pain, and there are also conflicting reports of the correlation of fecal incontinence with this condition. Cause
One of the main causes is suggested to be excessive and repetitive straining during defecation. Other causes include weakness of the pelvic floor muscles (secondary to age-related neuropathic degeneration or traumatic injury during pregnancy and labor. Diagnosis
Diagnosis is by rectal examination. A specialized tool called a "Perineocaliper" can be used to measure the descent of the perineum. A retro anal ultrasound scan may demonstrate the condition. "Anti sagging tests", whereby the abnormal descent is corrected temporarily, may help to show whether symptoms are due to descending perineum syndrome or are in fact due to another condition. Normally, the anal margin lies just below a line drawn between the coccyx (tailbone) and the pubic symphysis.