What are stitches?
Tingling, tingling, and prickling sensations are called paresthesias. They occur when nerve signals are altered and can occur along with numbness, burning pain, or hypersensitivity.
An arm or leg that falls asleep after pressure usually recovers quickly when the position is changed. Persistent or recurring symptoms need to be assessed based on a larger pattern.
Read also about numbness when sensation is clearly impaired rather than just altered.
Common causes of tingling
Local nerve compression can cause tingling in, for example, the hand or foot. Carpal tunnel syndrome typically affects an area in the hand, while nerve root involvement from the neck or back can radiate along an arm or leg.
Polyneuropathy can be caused by diabetes, alcohol, vitamin deficiency, medication or other illness. The symptoms often start in the feet and gradually spread upwards.
Stress and rapid breathing can cause temporary tingling around the mouth and in the hands. Neurological diseases can also cause tingling but are assessed based on more findings than the symptom alone.
When is tingling an acute symptom?
Call 112 if you experience sudden one-sided tingling or loss of sensation along with weakness, drooping corners of the mouth, speech problems, vision problems or severe dizziness.
Seek emergency care if you experience tingling in your legs with weakness, loss of sensation around your lower abdomen, or problems with urination and defecation.
Rapid assessment is needed if symptoms progress upward, affect breathing, occur after a serious injury, or are combined with severe head or back pain.
Call 112 for sudden unilateral sensory symptoms with weakness or speech impairment. Seek emergency care for bladder disorders or rapidly worsening symptoms.
How are recurring or persistent tingling sensations investigated?
The neurological examination tests touch, prick, vibration, temperature, strength, reflexes and coordination. The distribution helps to localize the nerve involvement.
Blood tests may include blood sugar, thyroid, vitamin B12, folate, salts, and other tests based on risk factors. Medications and alcohol habits need to be reviewed.
Nerve conduction studies and EMG are used in cases of suspected peripheral nerve or muscle disease. They provide different information than diagnostic imaging.
When is MRI used for tingling?
MRI of the neck or back may be used when symptoms follow a nerve root or when spinal cord involvement is suspected. The choice of area is guided by the distribution.
MRI brain may become relevant when the tingling is combined with other central neurological findings. In case of acute stroke symptoms, you should seek emergency care instead of booking a planned MRI.
MRI does not always show peripheral nerve function. In this case, nerve conduction studies may be more directly relevant.
What is good to document?
Draw a simple body sketch of where the tingling sensations are located. Note whether they are symmetrical, if they follow a certain position, and how long each episode lasts.
Describe weakness, clumsiness, balance problems, back or neck pain, and whether the sensation changes with coughing or movement.
Avoiding prolonged pressure on a nerve and varying your working posture can help with mechanical problems, but self-care should not delay assessment if symptoms worsen.