Nerve Sensations: Tingling in the Outer Thigh from Knee Pressure

Pressing on the outer side of the right knee causes a slight tingling sensation (similar to the feeling of ants crawling) on the outer side of the right thigh?

When pressing on the outer side of the right knee, there is a slight tingling sensation (similar to ants crawling) on the outer side of the right thigh.
Sometimes, when scraping the sole of the foot, a mild tingling sensation appears around the pressed area (near the sole), but there are no unusual sensations when not touching.
Occasionally, a light touch on the skin also elicits the same feeling (mostly occurring on the right foot).
Please help clarify this, thank you.

Cc, 50~59 year old female. Ask Date: 2021/09/10

Dr. Jiang Junyi reply Neurology

Dear Ms.
Cc,
Your symptoms, which include numbness, may indicate compression of the fifth lumbar nerve root.
Typical discomfort associated with lumbar radiculopathy includes pain radiating from the buttocks down to the legs, as well as numbness, tingling, and weakness in the toes.
Generally, after diagnosis, rehabilitation treatment can be initiated.

Physical therapy options include:
1.
Heat therapy: Primarily aimed at increasing local blood circulation and improving muscle ischemia.
2.
Shortwave and ultrasound therapy: Mainly used to promote blood circulation in deeper tissues.
3.
Transcutaneous electrical nerve stimulation (TENS) and medium-frequency vector interference current: These can provide localized pain relief and alleviate tension in the neck and shoulders.
4.
Spinal traction: Commonly used for degenerative lumbar arthritis, herniated discs (bone spurs), and cases with nerve root compression, as well as spinal injuries without fractures or joint instability.
Prior to traction, an X-ray should be performed to confirm joint stability.
I recommend that you visit a neurology or rehabilitation clinic for further evaluation and follow-up.
Please ensure to practice self-protection, maintain cleanliness and disinfection, and adhere to new preventive health measures before and after your medical visits.
Thank you for your inquiry.
If you have any related questions, feel free to discuss further!
Wishing you good health, peace, and happiness.
Dr.
Jiang Junyi, Taoyuan Medical Center

Reply Date: 2021/09/10

More Info

The sensations you are experiencing, particularly the tingling or "pins and needles" feeling in the outer thigh when pressure is applied to the knee, can be indicative of nerve involvement. This phenomenon is often associated with nerve compression or irritation, which can occur due to various reasons, including mechanical pressure, inflammation, or underlying medical conditions.

In your case, the tingling sensation in the outer thigh when pressing on the knee could be related to the lateral femoral cutaneous nerve, which supplies sensation to the skin of the outer thigh. This nerve can become compressed or irritated due to various factors, such as prolonged sitting, tight clothing, or even anatomical variations. When pressure is applied to the knee, it may indirectly affect the nerve pathways, leading to the tingling sensation you described.

Additionally, the tingling that occurs when lightly touching the skin or scraping the foot may suggest heightened sensitivity or hyperesthesia in that area. This could be due to nerve irritation or inflammation, which can alter the normal sensory processing in the nervous system. It is important to note that these sensations are often benign and may resolve on their own, especially if they are transient and not associated with other concerning symptoms.

However, if the tingling persists, worsens, or is accompanied by other symptoms such as weakness, pain, or changes in bowel or bladder function, it would be prudent to seek further evaluation from a healthcare professional. A thorough examination, including a neurological assessment, may be necessary to rule out any underlying conditions such as radiculopathy, peripheral neuropathy, or other nerve-related issues.

In terms of management, if the symptoms are mild and not significantly impacting your daily life, conservative measures such as avoiding prolonged pressure on the knee, stretching, and maintaining good posture may be beneficial. If the symptoms are more severe or persistent, a healthcare provider may recommend imaging studies, nerve conduction studies, or other diagnostic tests to better understand the underlying cause of your symptoms.

In summary, the tingling sensation in your outer thigh when applying pressure to your knee is likely related to nerve involvement, and while it may not be a cause for immediate concern, monitoring the symptoms and seeking medical advice if they persist or worsen is advisable.

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