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What is the pinch test for nipples?

The pinch test is a simple technique used to assess nipple sensation and nerve function in breastfeeding women. It involves pinching the nipple and areola area to see if sensations of pressure, pain, and warmth are felt. The pinch test is commonly used by lactation consultants and healthcare providers to evaluate nipple sensitivity, which can impact breastfeeding success.

When is the pinch test performed?

The pinch test may be performed at different times, including:

  • During pregnancy – To establish baseline nipple sensation before breastfeeding begins
  • Soon after birth – To assess nipple sensitivity as milk comes in
  • During breastfeeding – If mother is experiencing nipple pain or discomfort
  • After weaning – To evaluate nipple nerves after months of breastfeeding

Checking nipple sensation repeatedly allows providers to monitor and compare nerve function over time. Changes in sensation can indicate developing problems or nipple injuries.

How is the pinch test conducted?

To perform the pinch test, a lactation consultant or other provider will:

  1. Ask the mother to sit or recline comfortably with her breasts exposed
  2. Use their fingers to gently pinch the nipple and areola area, applying light pressure
  3. Ask the mother if she feels the pinch, and if it’s painful, uncomfortable, or warm
  4. Repeat pinches around the nipple and areola, comparing left and right sides

Mothers are asked to rate any pain or discomfort from 1-10. A visual pain scale may also be used. The pinch test takes only 1-2 minutes and does not harm breast tissue.

What is considered normal sensation?

Normal nipple sensation during the pinch test involves:

  • Feeling pressure and warmth – This signifies intact nerve pathways
  • Mild discomfort – Pain rating under 5 out of 10
  • Equal sensation in both nipples – Similar pressure, pain, and warmth should be felt bilaterally

Nipples that feel normal pressure and mild pain are reassurances of healthy nipple innervation needed for breastfeeding.

What indicates reduced nipple sensation?

Abnormal pinch test findings that may indicate problems include:

  • Numbness – Inability to feel pinch pressure at all
  • Tingling, burning, sharp pains – Unusual nerve sensations
  • Hypersensitivity – Severe pain, pain score over 7-8
  • Asymmetry – Reduced sensation in one nipple versus the other

These findings suggest potential nerve damage or neuropathy that requires additional evaluation. The cause could involve trauma, surgery, or underlying medical conditions.

Causes of reduced nipple sensation

Some reasons women may have decreased nipple sensitivity on the pinch test include:

  • Previous breast surgeries – Like mastectomy, breast reduction, or implants
  • Breast trauma or injuries – Past physical blows or damage to breast tissue
  • Pregnancy/postpartum complications – Diabetes, preeclampsia, Raynaud’s syndrome
  • Vascular problems – Poor circulation reduces nerve function
  • Autoimmune diseases – Like Sjogren’s syndrome, lupus, rheumatoid arthritis
  • Breast radiation – To treat cancer can harm nerves

Rarely, women are born missing nerve pathways that supply nipple sensation. Diagnostic tests like MRI, nerve conduction studies, and mammogram may be needed if causes are unknown.

How can reduced nipple sensation affect breastfeeding?

When nipples have decreased sensation, a mother may struggle with breastfeeding challenges like:

  • Difficulty latching baby on properly
  • Not feeling let-downs during milk ejection
  • Increased vulnerability to nipple damage or trauma
  • Greater risk of infection like mastitis
  • Low milk supply due to poor drainage
  • Early weaning due to frustration and pain

Thankfully, experienced lactation consultants can provide support to help mothers find ways to successfully breastfeed in spite of nipple sensitivity problems.

How is reduced nipple sensation treated?

Treatment options for reduced nipple sensation and related breastfeeding problems may include:

  • Lactation support and nipple shields to improve latch
  • Correctly sized flanges for breast pumps to fully empty breasts
  • Nipple stretching exercises to awaken nerves
  • Medications to improve nipple blood flow
  • Warm compresses before nursing to stimulate nerves
  • Acupuncture, when sensation loss has unknown cause
  • Surgery, if sensations improve after a temporal nerve block

In some cases, the cause of nipple neuropathy is untreatable, so lactation consultants play a key role in helping mothers adapt and succeed at breastfeeding under those circumstances.

What is the purpose of the pinch test?

In summary, the main goals and uses of the pinch test for nipples are:

  • Assess baseline nipple innervation and function
  • Monitor nerve sensation changes during pregnancy and breastfeeding
  • Identify causes of nipple pain or discomfort
  • Detect nipple injuries or neuropathy
  • Evaluate when nipple sensitivity is impacting breastfeeding
  • Determine when additional treatment or support is needed

This simple, quick test clues providers in to nipple sensory issues that can undermine breastfeeding success. Ensuring nipple health and function is vital for mothers hoping to meet their own breastfeeding goals.

Pinch Test Results Interpretation

Here is a table summarizing how pinch test results may be interpreted:

Pinch Test Findings Interpretation
Normal pressure sensation Intact nipple innervation
Mild discomfort, rating under 5/10 Expected response to pinch
Equal sensation bilaterally No asymmetric nipple issues
Numbness, inability to feel pinch Nerve damage present
Tingling, burning, shooting pain Nerve hypersensitivity
Severe pain, rating over 7-8/10 Nipple injury or neuropathy
Decreased sensation unilaterally Problem isolated to one breast/nipple


The pinch test offers breastfeeding women and their healthcare providers with a fast, easy way to assess nipple innervation and sensation. Normal findings reassure moms their nipples are ready for the breastfeeding journey ahead. Abnormal results flag issues that may require treatment or extra lactation support. Monitoring nipple sensitivity at multiple time points allows concerns to be caught early before they interfere with breastfeeding success.