Silicea - Reversed & Reworded Kent Repertory symptoms
Silica, Pure Flint, Silica Terra, Silicon Dioxide, Schuessler Tissue Salt, Cell Salts, Tissue Salts, Biochemic Tissue / Cell Salt Number # 12 / TwelveHPUS indication: Formation of pus

Homeopathic remedies are prescribed on the basis that in a tiny dilution like cures like, so while the very dilute homeopathic remedy may help, the raw product is often best avoided.
Below are the strongest indications of Silicea in traditional homeopathic usage, not reviewed by the FDA.