Karsai / lingam (prostate) massage is a Chiang Mai specialty — but mostly the health kind. Almost all the real ones are run by massage schools as therapeutic treatments, a step removed from the adult scene; some happy-ending shops now do a skilled version, though it varies by therapist. The genuine spots are few.
A proper session runs 1,500~3,000฿ (60-90 min). One Chiang Mai quirk worth knowing: the local lingam style oddly tries to physically block ejaculation, which can actually be bad for your health — so choose on reviews and know what you're booking. Full service, where offered, is a separate negotiation.
By appointment or walk-in at the spas that offer it, mostly daytime into evening. The 1 venues below are live-ranked by 7-day visitor traffic and recent reviews. Updated daily.