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

Know Your Remedies: Calcarea Sulphurica (Calc-s.) 1

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 acute and self-limiting complaints, take one pill or five drops of the remedy every 1 to 4 hours (1 hour for intense symptoms, 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. Chronic symptoms or complaints require a course of professional treatment to manage the changes in potencies and remedies that will be required.

More Information

Guidelines on which potency to use

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