"By the sacred anointing of the sick and the prayer of the priests the whole Church commends those who are ill to the suffering and glorified Lord, that he may raise them up and save them. and indeed she exhorts them to contribute to the good of the People of God by freely uniting themselves to the Passion and death of Christ."
CATECHISM OF THE Catholic Church
Paragraph 1499
In the Sacrament of the Anointing of the Sick, Christ uses the anointing and prayers of the priest to give comfort and strength to the soul and to the body of one seriously ill — mentally or physically. We meet Christ here to receive his healing comfort, strength, and pardon. Don't be afraid to call for the Pastor to minister this sacrament at every serious change in your condition.
"Is any among you sick? Let him call for the presbyters of the Church, and let them pray over him, anointing him with oil in the name of the Lord; and the prayer of faith will save the sick man, and the Lord will raise him up; and if he has committed sins, he will be forgiven."
JAMES 5:14-15