As the result of prolonged and painful illness, starting with a varicose ulcer on his right leg and ashamed of it and his consequent obesity, Sancho went into retirement at Tudela at some point, when his youngest sister Blanche came from Champagne and took administration of the kingdom until she died in 1229.
Kao rezultat dulje i teške bolesti, počevši s proširenim čirom na desnoj nozi i sramom zbog posljedične pretilosti, Sančo je otišao u mirovinu u Tudelu u jednom trenutku, dok je njegova najmlađa sestra Blanka došla iz Champagne i preuzela upravu Kraljevstva sve dok nije umro 1229.