If you have cankers sore, homeopathic remedies can help; however, you should choose the remedy that matches your symptoms. If you have questions, please consult a homeopath.

Arsenicum album

Canker sores with burning pain, which is relieved with a hot drink. The canker sores may be white or bluish; the tongue is usually white and will desire frequent small sips of water as the person is thirsty.

With great restlessness and anxiety, and desire for company, the picture worsens after midnight between 1 and 3 hours.

Borax
one of the leading homeopathic medicines for thrush, along with Merc Sol and sulphuric acid

Canker sores are very painful in the mouth, tongue, inner part of the cheeks, which bleed easily when touched or when eating, with salivation, heat in the mouth, or dryness and thirst. It usually is seen in breastfeeding children who start to suckle and leave the breast because they cannot continue because of the pain. The child is very screaming and nervous.

Hepar Sulfur
Ulcerations in the gums and on the mouth with the base look greasy, they are very painful, and with suppuration, the pain is as if it were splinters or prickle. The gums hurt and bled.

Kali Mur.

White sores in babies or mothers who breastfeed with a fetid breath, the gums are swollen and inflamed, the swollen glands in the neck.

Merc Sol.

Canker sores, especially in children, located on the tongue, mouth, and pharynx, are painful. There is an intense thirst for cold drinks, with excessive salivation, the tongue is flabby and swollen, with tooth impressions, the breath is very foul and there is a metallic taste in the mouth.

Sulphuric acid

Canker sores, especially in children, with a bloody offensive secretion, the canker sores are in plaques on the tongue, gums, or the whole mouth. The child smells sour; despite being bathed, there is usually exhaustion, vomiting, and diarrhea.

If you need a homeopathic home kit, you can buy it with me, more information.