In Dr. Hamer’s New Medicine, mouth and tongue ulcers (aphthae) and their recurring connection to a woman’s menstrual cycle are explained through ectodermal tissue mechanics, handedness, and cyclic hormonal shifts.

1. The Biological Cause of Mouth & Tongue Ulcers

• Tissue & Brain Relay: The lining of the mouth, tongue, and oral mucosa consists of ectodermal squamous epithelium (Plattenepithel). It is controlled by relays in the cerebral cortex (Großhirnrinde in the deep temporal lobe).
• Conflict Trigger: Oral ulcers are initiated by a conflict of speech, taste, or oral boundary—such as having to “bite one’s tongue,” being forced to swallow/taste something repulsive, or a conflict regarding something said or experienced orally [4, 163–165].
• The Two-Phase Rhythm:
  • Conflict-Active Phase (ca-Phase): Under active conflict stress, the squamous mucosa undergoes controlled ulceration or cell loss (Ulcera). During this time, the tissue may feel slightly numb or go unnoticed.
  • Healing Phase (pcl-Phase): Once the conflict is resolved (Conflictolyse), the body uses swelling, inflammation, and cellular regeneration to refill the mucosal defects. This repair process produces the red, painful, swollen lesions known as aphthae or mouth ulcers [163–166, 169].

2. The Role of Left-Handedness (Linkshändigkeit)

• Hemispheric Switching: Handedness determines which hemisphere of the brain receives a conflict shock. While a right-handed woman processes female-sexual or oral territorial conflicts in the left cerebral hemisphere, a left-handed woman processes them in the right cerebral hemisphere [106, 137, 150–152].
• Preservation of Menstruation: Because her conflict registers on the right side of the brain, a left-handed woman does not lose her ovarian function or menstrual cycle (unlike a right-handed woman, who may experience amenorrhea/lost periods during left-hemispheric conflict activity). Her ovulation and periods continue normally.

3. Why Mouth Ulcers Flare Up During Periods

The recurring appearance of mouth or tongue ulcers right around menstruation in a left-handed woman is caused by the interaction of hormonal cycles and conflict tracks (Schienen) [104, 143, 162, 166–169]:

1. Hormonal Threshold Shifts: The natural rise and fall of estrogen and progesterone during the menstrual cycle alters the brain’s cortical conflict threshold.
2. Cyclic Conflict Resolution: As hormone levels shift during her period, the active conflict or subconscious track temporarily drops off or unblocks.
3. Menstrual Healing Flare: When the conflict drops off during her period, the oral mucosa immediately enters the vagotonic healing phase (pcl-Phase), causing painful aphthae or ulcers to swell and erupt [12, 163–166, 169].
4. The Recurring Pattern: Once the period ends and hormonal levels shift back, the subconscious conflict track reactivates until the next monthly hormonal drop triggers another healing flare [162, 166–169, 175].