Wherever burning irritation is involved think of Canth (and compare with Apis).
It is most often required for burns. Whether sunburn or accidental burn, if there is blistering, either imminent or actual, with stinging pains relieved by cold applications, think of this remedy and give it quickly!
Similarly, in urinary problems if the urine is burning hot and painful, think of Canth. If they need to urinate all the time even if little is produced and it is burning and painful this remedy may be required.
Burns with blistering better from cold
Sunburn – just before blistering forms
Frequent hot urination
Burns (inc Sunburn)
Cystitis