The Aonikenk treat sickness with two forms of medicine: natural and magical.
The knowledge of natural medicine was not exclusive of the shamans; it was based of resources available in the surroundings. Constipation, for example, was cured with the gauycurú, a plant used as a purgative. They also used Pampa Tea (Satureja darwini), as an anti inflammatory, for stomach pains and infections. They also has a herb that grows in the estuary of the Gallegos River for rheumatic pains.
As the Selk´nam people, they probably used the Romerillo for improving their vision and, to calm stomach pains, they used the bark of zarzaparilla (Ribes magellanica). When natural medicine failed, the shamans intervened with magic medicine. For healing, they used amulets, stones and noisy rattles to drive away the malignant spirits .