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Know Your Remedies: Calcarea Sulphurica (Calc-s.)

Common Names: Gypsum; plaster of Paris; sulphate of calcium; Ca SO4.

General Information

Calcarea Sulphurica (Calc-s.) is a remedy for infected discharges (suppuration) with thick and yellow pus, or the tendency for wounds and infections to suppurate in this manner. The discharge may arise from an abscess, sinusitis, middle ear infection (otitis media), tonsillitis, infected wound, empyema (pus around a lung), pneumonia, ulcer, or gonorrhoea. Infections are described as ‘pus with a vent’ rather than being closed infections. The person needing Calc-s tends to dislike warm environments or wraps and prefers open air but dislikes drafts. They may crave sour or green unripe fruit and vegetables and feel worse for milk, physical exertion and getting wet.

Mental-Emotional Symptoms

  • Discontented and irritable.
  • Strong sense of self-importance.
  • Brooding and lamenting that he is not appreciated.
  • Jealousy
  • Fear of birds.

Head and Face

  • Acne – often severe.


  • Otitis media with chronic discharge.
  • Mastoiditis (inflammation or infection of the mastoid bone behind the ear).
  • Purulent tonsillitis.

Chest and Respiration

  • Croup or croupy cough which improves in open air.
  • Abscess or empyema (pus around a lung).


  • Abscesses, especially when the abscess has ruptured or has been lanced.
  • Boils or furuncles (infections of hair follicles) with prolonged discharges of yellow pus.
  • Wounds with a chronic discharge of pus that won’t heal.
  • Fistula (an abnormal passage between organs or to the skin) with discharge.


  • Burning and itching soles of the feet.

Where do I find it?

Calcarea Sulphurica (Calc-s.) is available from our online store as a single remedy in either pills or liquid, and as part of the following Complexes (combination remedies): Acne (Pimples); Boils & Ascesses.


While above self-limiting or acute complaints are suitable for home treatment also contact your healthcare provider during emergency situations or if symptoms worsen or fail to improve. Chronic or persistent complaints, which may or may not be mentioned above, require a different treatment and dosage protocol so are best managed by a qualified homeopath for good results.

Dosage Instructions (suitable for babies to adults)

For the home treatment of acute and self-limiting complaints take one pill or five drops of the remedy every 1 minute to 4 hours (1 minute for intense or emergency symptoms (plus seek emergency help), 4 hours for milder ones). Once an improvement is noticed, stop dosing and repeat the remedy only if symptoms return. If there is no improvement at all by three doses, choose a different remedy or seek professional guidance.

Note: Chronic symptoms or complaints require a course of professional treatment by a qualified homeopath to manage the changes in potencies and remedies that may be required.

More Information

Guidelines on which potency to use

From Past Masters

Homeopathy is a 200-year system of medicine. Early medical homeopaths recorded initial provings, remedy relationships, and their early experiences with each remedy in great detail.

These writings were then shared with others to advance homeopathic knowledge and practice.

Today, these same writings give a fascinating insight into the symptoms and clinical conditions for which each remedy was used.

The following extract, with minor editing, is one example.

Leaders In Homoeopathic Therapeutics by E. B. NASH M.D.

Calcarea Sulphurica (Calc-s.)

One of Schuessler’s so-called tissue remedies, not well understood as yet, but acting much along the line of Hepar sulphur, so far as we do know.

I once had a case in which there was great pain in the region of the kidneys for a day and night. Then there was a great discharge of pus in the urine, which continued several days and weakened the patient very fast. A Chicago specialist had examined the urine a short time before, and had pronounced the case Bright’s disease.

I finally prescribed Calcarea sulphurica l2th and under its action she immediately improved and made a very rapid and permanent recovery.

Since then I have found it a good remedy in profuse suppurations in different kinds of cases. This is all I know about the remedy.