Agrostemma githago, the common corn-cockle (also written “corncockle” and “corn cockle” and known locally simply as “the corncockle”). Corn cockle is a herb. The root and seed are used to make medicine.
The seed is diuretic, expectorant and vermifuge. Minute amounts are used medicinally. It has a folk history of use in the treatment of cancer, warts etc.
Corn cockle seeds are sometimes applied directly to the skin for treating cancers, tumors, warts, and swelling of the uterus; and for causing swelling of the eye’s cornea and conjunctiva.
The root is applied to the skin for treating sudden skin break-outs caused by a viral or bacterial infection (exanthemata) and hemorrhoids.
Corn cockle is UNSAFE to take by mouth. Several chemicals found in it are considered poisonous. Poisoning symptoms include diarrhea, drooling, dizziness, vomiting, paralysis, breathing difficulty, and coma.
There isn’t enough information to know whether it is safe to apply corn cockle to the skin.
Special Precautions & Warnings:
Pregnancy and breast-feeding: It’s UNSAFE for anyone to use corn cockle. If you are pregnant or breast-feeding, you have your baby’s health as an extra reason not to use it
Please read the medicine’s instructions and consult your doctor!
Agrostemma githago, Cockle, Corn Campion, Corn Rose, Crown-of-the-Field, Neguilla, Nielle, Nielle des Blés, Œillet des Champs, Purple Cockle
Source: Wikipedia, https://en.wikipedia.org/wiki/Agrostemma_githago