A great remedy for sore throats, diphtheria and rheumatism. Use it for erratic pains, alternating sides, only commence on the opposite side and often alternation of sides. Great weakness and prostration. Breast seem very full. Breasts swollen, painful before and better on appearance of menses. Mastitis, worse from the least movement. Breasts very painful, feel as if full of very hard lumps. Loss of milk while nursing. Dries up the milk while nursing. Menses too early, profuse, flow in gushes. acute ulceration and follicular stomatitis, and gangrenous, Mouth cracking of jaw while eating. Overall, Lac can can be used for Arthritis, Mastitis (Breasts painful), Colic, Dysmenorrhea, Leucorrhoea, Rheumatism, Sciatica, Sore throat, Ulcers, Uterus disorders, Varicose veins, Weakness.