Martin & Pleasance Tissue Salts Comb I Fibrositis 125T. Fibrositis and muscular pain-sometimes called muscular rheumatism is marked by pain and stiffness. It is caused by inflammation of the sheaths surrounding the muscle fibres which are involved with body movement. Combination I provides three tissue salts which act together favourably for this condition. Naturally if trouble persists, please contact your health care practitioner. Tissue Salts are micro doses of minerals that help rectify mineral imbalances which may be the cause of many common ailments. Tissue Salts may assist the absorption of nutrients from food and supplements.