Holy water in the context of Erawan shrine

A sacramental (Latin pl. sacramentalia) is a sacred sign, a ritual act or a ceremony, which, in a certain imitation of the sacraments, has a spiritual effect and is obtained through the intercession of the Church. Sacramentals surround the sacraments like a wreath and extend them into the everyday life of Christians. Sacramentals are recognised by the Catholic Church, the Eastern Orthodox Church, the Oriental Orthodox Churches, the Church of the East, the Lutheran churches, the Old Catholic Church, the Anglican churches, and Independent Catholic churches.

In the Bible, prayer cloths and holy oil are mentioned in reference to praying for healing. Holy water is a sacramental that the faithful use to recall their baptism; other common sacramentals include blessed candles (given to the faithful on Candlemas), blessed palms (blessed on the beginning of the procession on Palm Sunday), blessed ashes (bestowed on Ash Wednesday), a cross necklace (often taken to be blessed by a pastor before daily use), a headcovering (worn by women, especially during prayer and worship), blessed salt, and holy cards, as well as Christian art, especially a crucifix. Apart from those worn daily, such as a cross necklace or devotional scapular, sacramentals such as a family Bible, are often kept on home altars in Christian households. Ichthys emblems are sacramentals applied to vehicles to signify that the owner is a Christian and to offer protection while driving. When blessed in a betrothal ceremony, engagement rings become a sacramental.

Aspersion (la. aspergere/aspersio), in a religious context, is the act of sprinkling with water, especially holy water. Aspersion is a method used in baptism as an alternative to immersion or affusion. The word is formed of the Latin aspergere, 'to sprinkle', of ad, 'to', and spargo, 'I scatter' (Ezekiel 36:25–26, 1 Corinthians 10:2, cf. Psalm 77:16-20).

In addition, aspersion is performed as part of certain rites to remind people of their baptism, such as the renewal of baptismal vows performed by the Catholic Church and Lutheran Church at Easter.

A curandero (Spanish: [kuɾanˈdeɾo], "healer"; f. curandera, also spelled curandeiro, Portuguese: [kuɾɐ̃ˈdejɾu], f. curandeira) is a traditional native healer or shaman found primarily in Latin America and also in the United States. A curandero is a specialist in traditional medicine whose practice can either contrast with or supplement that of a practitioner of Western medicine. A curandero is claimed to administer shamanistic and spiritistic remedies for mental, emotional, physical and spiritual illnesses. Some curanderos, such as Don Pedrito, the Healer of Los Olmos, make use of simple herbs, waters, or mud to allegedly effect their cures. Others add Catholic elements, such as holy water and pictures of saints; San Martin de Porres for example is heavily employed within Peruvian curanderismo. The use of Catholic prayers and other borrowings and lendings is often found alongside native religious elements. Many curanderos emphasize their native spirituality in healing while being practicing Catholics. Still others, such as Maria Sabina, employ hallucinogenic media and many others use a combination of methods. Most of the concepts related to curanderismo (the practice of curanderos) are Spanish words, often with medieval, vernacular definitions.

Blessed salt has been used in various forms throughout the history of Christianity. Among early Christians, the savoring of blessed salt often took place along with baptism. In the fourth century, Augustine of Hippo named these practices "visible forms of invisible grace". However, its modern use as a sacramental remains mostly limited to its use with holy water within the Anglican Communion and Roman Catholic Church.

Sacred waters are sacred natural sites characterized by tangible topographical land formations such as rivers, lakes, springs, reservoirs, and oceans, as opposed to holy water which is water elevated with the sacramental blessing of a cleric. These organic bodies of water have attained religious significance not from the modern alteration or blessing, but were sanctified through mythological or historical figures. Sacred waters have been exploited for cleansing, healing, initiations, and death rites.

Ubiquitous and perpetual fixations with water occur across religious traditions. It tends to be a central element in the creations accounts of almost every culture with mythological, cosmological, and theological myths. In this way, many groups characterize water as "living water", or the "water of life". This means that it gives life and is the fundamental element from which life arises. Each religious or cultural group that feature waters as sacred substances tends to favor certain categorizations of some waters more than others, usually those that are most accessible to them and that best integrate into their rituals.

Among Eastern Orthodox and Eastern Catholic Christians, holy water is blessed in the church and given to the faithful to drink at home when needed and to bless their homes. In the weeks following the Feast of Epiphany, clergy visit the homes of parishioners and conduct a service of blessing by using the holy water that was blessed on the Feast of Theophany. For baptism, the water is sanctified with a special blessing.

Throughout the centuries, there have been many springs of water that have been believed by members of the Orthodox Church to be miraculous. Some still flow to this day, such as the one at Pochaev Lavra in Ukraine, and the Life-Giving Spring of the Theotokos in Constantinople (commemorated annually with the blessing of holy water on Bright Friday).