Spa Week kicks off April 13, but booking the $50 treatments starts Monday. To make appointments, visit Spaweek.com. Meanwhile, here are some to consider:

Amore Pacific Beauty Gallery and Spa (114 Spring St.; 212-966-0400)

Vitalizing recovery facial – It’s a 50-minute facial with red-ginseng complex and bamboo-sap products that help hydrate. Originally $100.

Chill Wellness Institute & Spa (40A E. 33rd St.; 212-213-2000)

Hot lava shell massage – A 60-minute massage uses heated shells from the South Pacific. Originally $95.

The Salon & Spa at Saks Fifth Avenue (611 Fifth Ave., concourse level; 212-940-4000)

Mani and pedi – In one hour, you get both your hands and feet done and treated with hydrating lotions. Originally $75.

Homme Spa (465 Lexington Ave.; 212-983-0033)

Algo treatment – This 50-minute thermo-corrective treatment cools the facial skin to decongest, hydrate and reduce redness. Originally $125.

L’Institut Sothys New York (37 W. 57th St.; 212-688-9400)

Passion fruit and pomegranate treatment – A 45-minute facial. Originally $75.

Red Door Spa (691 Fifth Ave.; 212-546-0200)

“Stress-melter” ritual – This 50-minute procedure includes a full-body exfoliation, aroma therapeutic body wrap and scalp massage. Originally $235.