It might be vasospasm or Raynaud’s syndrome. Raynaud’s is the constriction of the capillaries in the nipple and it causes extreme pain.
- If you have vasospasm, you will notice a blanching of the nipples when the baby releases the nipple. Observe the color change of the nipple from white to blue to red.
Help for vasospasm: https://kellymom.com/bf/concerns/mother/nipple-blanching/