Forestier studied medicine in Paris, later working at Hôpital Cochin, where he became interested in rheumatology and its treatment. In 1928 he took part in the founding of the French society of rheumatology. His father, Henri Forestier, was a director at the therapeutic spas in Aix-les-Bains.
"Forestier-Certonciny syndrome": also referred to as "pseudo-polyarthrite rhizomélique" or as polymyalgia rheumatica. Published in an article titled, Pseudopolyarthrite rhizomelique; in Revue du rhumatisme et des maladies osteo-articulaires, Paris, 1953, 20: 854-862.