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Karsai Nei Tsang
Taoist Genital Detox Massage

Karsai means "the sedimentation in the veins", and is a treatment aimed at clearing the sand like crystalline deposits of toxins in the tissues and veins of the genital area. Chi Nei Tsang does some external abdominal work on the areas of the uterus, ovaries, and prostate gland, but Karsai Nei Tsang further focuses specifically on the blockages of the reproductive system and the genitals, especially the blockages that take the form of sedimentation in the veins.


In order to have healthy, functioning genitals we need a rich supply of blood flow.  When this blood flow becomes blocked with crystal like sedimentation and fatty deposits, the human sexual arousal response is greatly affected.  With a poor flow of blood to the genital area men will often experience difficulty in getting and maintaining good erections. A woman's arousal also depends on a good healthy blood flow, and she might have difficulty in getting the proper swelling of her labia and clitoris and producing the sexual fluids.  


Karsai Nei Tsang releases the blockages and sedimentation in the veins that cause poor blood flow.  Good circulation will also assist the release of hormones, and a healthy balance of hormones will not only increase sexual vitality, but also brain and mental function.  This treatment is essentially beneficial to older people to maintain healthy sexual function. KNT is also very helpful in preventing other problems of old age such as memory loss, back pain, poor circulation and problems associated with menopause. 


KNT is also very beneficial for anyone feeling blocked sexually, and can often assist in clearing energy and emotional blockages from a sexually repressive upbringing and/or past traumatic experiences. 

Karsai Nei Tsang is an adjunct to Chi Nei Tsang and is an option for those who feel the need to work in the genital area.  It is always preceded by a complete abdominal treatment, and if only offered after several CNT sessions have been completed to clear blocked emotional energy that could be related to sexual truama.


It could involve external work in the groin only, including lymphatic glands, or include internal work, for both men and woman.  For women this could include the interior of the  vagina and rectum if required.   The male treatment works internally on the prostate and externally on the scrotum and testicles. The muscle tension of the anal sphincter can also represent  control dramas (often stemming for toilet training), and this energetic blockage can cause psychological problems and difficulties in relationships, as well as physical problems such as hemorrhoids.

All work is done hygienically with surgical gloves.


Due to considerations of modesty and a complicated relationship to sexuality in the West, KNT is normally excluded from ordinary Chi Nei Tsang sessions, but is typically offered as part of the CNT treatment in Asia. 


Karsai Nei Tsang is not intended as a sexual massage, and does not focus on achieving sexual arousal, and is a purely therapeutic treatment of the tissues, muscles and organs.  The genital organs are typically neglected from our body-work therapies, and can store long held energetic blocks and deeply guarded emotions.  KNT is not a “yoni, or lingam or tantric massage”. It is always preceded by a deep abdominal CNT session, and is specifically advocated for older people to counteract the effects of aging, and for those who feel blocked sexually, or experience a lack of sensation or painful sensations in the genitals, or those who have had sexual traumas and are unable to have normal sexual relations. 

Sexual energy is a very powerful healing agent in our lives.  Sexual vitality is a sign of good health. Sexual energy blockages can cause many problems in our lives, both emotionally, mentally, in our relationships, and also problems for our reproductive health such as in endometriosis, ovarian cysts, blocked or tangled Fallopian tubes,  enlarged prostate, low fertility, low libido, and irregular, painful or no menstruation.

Protocol: As a male therapist, I recommend that female clients bring their partner or a friend to be present during the session.  If needed, I will have a female colleague present for the comfort of the client.

Following are some testimonials from clients who have received Chi Nei Tsang and Karsai Nei Tsang from me.

I felt like some weight has been lifted of me, and a free flow of energy after yesterday's session. I appreciate your professionalism in this kind of deep energy work.  Joel, Arambol, 2020.

There is boundless beauty in finding a space held so sacredly, so surely, with so much love, trust, and respect. One can release into themselves and allow for those pieces of the self to emerge with trust that it is safe. To feel so vulnerable, shades of the self that haven’t had contact for however long, can show themselves and be present to the healing space and release, if ready. I’ve now had two sessions with Zendrik, Receiving both Chi Nei Tsang and Kar Sai Nei Tsang in each. As a being with a history of sexual abuse, it is powerful and very vulnerable to work and massage the sexual organs and the abdomen. Zen held a space I felt I could trust and be safe to fully open in. To cry and call out as the tensions of the past made their way out of my tissues. I found his touch to be respectful, experienced, encouraging of energetic and emotional depths. Without hesitation, I would recommend a session with Zendrik. His therapeutic style seems to me gentle yet sure and open yet held. This work for me, was needed. I am grateful to have trusted my self. As well as Zendrik. Blessed journey all.  Jasmine, San Marcos La Laguna, 2018

Zen is a very powerful authentic and very experienced healer. He helped me physically a lot but also so much emotionally and spiritually. He has a very loving, compassionate and yet professional manner that made me feel safe and loved which allowed healing to come through. I recommend everyone have a session with Zen.
               -   Lauren Michelle Cukierman, Australia/Thailand ( August 2016)


During my trip to Thailand in 2016, I had the opportunity to receive several Chi Nei Tsang and Karsai Nei Tsang massages from Khun Ni in Chiang Mai, one of the major disciples of Tao Master Mantak Chia. As I found it important to continue with this kind of treatment, I was very happy to meet Zendrik from Ananda Healing Centre in San Marcos during my trip in Guatemala in April this year (2017). Both therapies, based on ancient Tao knowledge, not only detoxifies and regenerates the body’s vital functions but also helps to get in touch with yourself in a very deep way and to release long stored unresolved emotions. We women carry the burden of a collective female pain-body. Since thousands of years we suffer pain caused by oppression, slavery, exploitation, sexual abuse,… . Moreover, some of us, like me, have also suffered sexual traumas during childhood. Over the years, I realized that the ‘western’ medical treatments and approaches have serious limitations in fostering a deep emotional and physical healing process that helps me to reconnect with my body and sexual energies in a loving-kindness way; they even had the opposite effect: they were re-victimizing me.  While energy-based body work, such as these Toa based massage techniques, has very powerful healing effects in coming to terms with deep and stored emotions of guilt, angry and fear caused by this childhood trauma.


The sessions with Zendrik, my first experience with a male therapist for this kind of massages, helped me to go to another level of my self-healing journey in a safe, trustful and respectful space. Zendrik has a unique healing gift to support you during and after the sessions in very professional and kind way, which helps you regaining trust in men. Each of my sessions in Thailand were a transformative journey though, the therapist offers little emotional support during the massage therapies. Whereas Zendrik, besides doing the technical part of the massage, guides you through the upcoming emotions, memories and experiences with meditation techniques which allows you to go deeper in your own healing process and make you feel safe throughout. I am very grateful to Zendrik for the profound and deeply realizing experiences which allowed me to release and move blocked energies with such care and for the compassionate and supportive follow-up chats.

                      -   Lieselotte, Belgium (May 2017)

Zendrik is an exceptional healer. I had a few sessions with Zen for Chi Nei Tsang and Karsai Nei Tsang massage to clear blockages in my lower chakras that were preventing me from fully standing in my power, in addition to experiencing severe exhaustion and physical discomfort. I am an extremely sensitive healer. Because of this, I am hesitant to work with many practitioners since I tap into all of their "stuff". In addition to that, before meeting Zen I would have never felt comfortable enough to experience Karsai Nei Tsang massage, especially from a man, as I am healing through sexual trauma. Zen's energy is extremely pure and his professionalism made me feel safe and supported. He holds incredibly nurturing space for deep and lasting healing to unfold. In our session I was able to release emotional and physical blockages in the pelvic area that were really holding me back from fully expressing who I am. As the session progressed, I felt a reactivation of my pranic tube extending directly through the center of my body, through my pineal and my perineum. I experienced a profound connection to all that is, a deeper connection to my physical body and a culmination of my creative energy. As I lay on the massage table I felt my life-force energy increase and my physical strength return to me. After my sessions with Zen I feel much more present in my body and more energized in addition to greater alignment with my powerful and precious feminine nature. The positive effects of his work are palpable and his commitment to the healing arts is evident in everything he does. Zen is an extremely skilled, wise, intuitive and compassionate practitioner and is an asset to the San Marcos community.

                    -  Marisa.  USA ( April 2017)

"I’ve had multiple sessions with Zendrik on two different visits to San Marcos.   The sessions have included both Chei Nei Tsang (abdominal healing) and Kra Sai (genital healing).  Zendrik is a mindful professional that communicates clearly, keeps professional boundaries and carefully explains each type of healing modality to ensure that you are clear and comfortable with everything he does.   He continues to check in with you during the session to be sure that you are completely comfortable at all times.   It was also clear that if I was not comfortable at any time I could simply let him know.  I never needed to but it was comforting to know that there was plenty of space for me to do so if needed.  At each session I felt completely safe and cared for.  Zendrik’s integrity and dedication to the healing of others is quite evident.  


My sessions helped to release emotions, old traumas and stories that were being held in my body.  Through the sessions I was able to get in touch with parts of my body that were isolated and integrate them into a more wholesome way of living.  I look forward to more work with Zendrik when I return to San Marcos!  Zendrik is a master of this healing modality and I am deeply grateful that he is leading the way for this type of healing for both women and men.  He is a gift to San Marcos and the world!"


- Cherie, USA

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