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Cantharis
Cantharis vesicatoria (Spanish fly)
Cantharis uses in homeopathy: a key remedy for violent burning urination (cystitis/UTI) with cutting pains, and for burns and scalds with blistering, its symptom picture, common potencies, FAQs — informational.
Quick answer
What is Cantharis used for in homeopathy?
Cantharis, from the Spanish fly, is a homeopathic remedy whose great keynote is intense, violent burning — especially of the urinary tract (cystitis, UTI) with cutting pains before, during and after urination — and of burns and scalds.
Reviewed & updated: June 2026
This is general information about a homeopathic remedy, not a prescription or dosing advice. In homeopathy the correct remedy and potency are chosen for the whole individual symptom picture by a qualified homeopath — the same remedy is not right for everyone. Do not self-medicate, and consult a qualified homeopathic doctor (and your physician for serious or persistent conditions) before taking any remedy.
What Cantharis is used for
- Urinary tract infection / cystitis with violent burning
- Cutting pain before, during and after urination
- Constant urging with only drops of urine passed
- Burns and scalds with blistering
- Intense burning, raw, smarting sensations
Characteristic symptom picture
Homeopaths look for these guiding features when considering Cantharis.
- Violent burning and cutting in the urinary tract
- Intolerable, constant urging to urinate
- Burning pains better from cold (in burns)
- Rapidly developing, intense inflammation
- Great restlessness with the pain
Potency
Cantharis is commonly used in 30C and 200C; potency selection is a clinical decision for your homeopath.
The characteristic picture & modalities
Cantharis is dominated by one great keynote — intense, violent burning. In the urinary tract it shows as cystitis with cutting pain before, during and after urination, intolerable constant urging, yet only drops of urine passed. The same fierce, raw, smarting burning appears in burns and scalds with blistering, where the pain may feel better from cold. Inflammation tends to develop rapidly and intensely, often with marked restlessness during the pain. This is a recognisable symptom pattern, not a diagnosis, and it suits only some people whose burning state genuinely matches it.
Before you take Cantharis
This page is materia-medica background, not a prescription. In homeopathy the remedy and its potency are selected by a qualified homeopath who matches them to your whole individual picture, not to a single keynote, and you should never self-select a potency from what you read here. A urinary infection with fever or back pain needs medical care and possibly antibiotics, and serious burns need immediate professional treatment. Use this only to understand the remedy's traditional uses, and seek a proper medical assessment for any severe or persistent symptom.
Conditions where Cantharis is considered
Frequently asked questions
What is Cantharis used for?
Its keynote is violent burning — especially of the urinary tract (cystitis/UTI) with cutting pains and constant urging — and of burns and scalds. The right remedy depends on your picture.
Is Cantharis good for a burning UTI?
It is one of the most-considered remedies for cystitis with violent burning and urging, but UTIs with fever or back pain need medical care and possibly antibiotics.
Does it help burns?
It is traditionally considered for blistering burns and scalds; serious burns need immediate medical care.
Can I self-prescribe it?
No — consult a qualified homeopath, and seek care for severe burns or UTIs with fever.
Don’t self-prescribe — consult a homeopathy doctor
The right remedy and potency are chosen for your individual case. Book an online or in-clinic consultation with a qualified homeopath.
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