Please note that this is an astrological perspective on health and not a medical one. For the medical perspective, please consult your doctor.)
Pluto's move out of Sagittarius and into Capricorn has important health implications for you. It is a stressful transit. Of itself, it is not enough to cause any major problems but it does impact somewhat on your overall energy. This year only two long-term planets are in stressful aspect (and Pluto will only be in stressful aspect part of the year). Health is reasonable, but energy is not as strong as last year. The time to get more defensive is when the short-term planets start to make stressful aspects - this will be from March 21 to April 19; August 19 to October 23 and from December 21 to December 31. These will be periods to rest and relax more and to pay more attention to your health.
The good news here is that there is much you can do to enhance health and prevent problems before they develop. Pay more attention to the liver, thighs (ruled by Jupiter, your health planet) and to the spine, knees, teeth, bone structure, gall bladder and overall skeletal alignment. (Your health planet will be in Capricorn, which rules these things.) Since these are the most vulnerable areas - and problems, should they happen, would most likely begin there - keeping them healthy and fit is good preventive medicine.
This is a good year for regular visits to a chiropractor. Yoga, Pilates and Alexander Technique are also excellent for the posture and spinal alignment. Perhaps you need more calcium in the diet to strengthen the bones. Regular back and thigh massage would also be very helpful. Knees should be given more support when exercising.
Most of our readers already understand that disease winds up in the physical body but never originates there. Always it has its roots in the more subtle dimensions and bodies. Thus if a person wants true and lasting healing he or she must also deal with the spiritual or subtle roots of the problem. The beauty of the Horoscope is that it shows us these things very clearly.
With you, the spiritual causes of possible problems lies in the love life, the marriage and the social relationships. (Your health planet is in the 7th House this year.) Thus if a problem occurs, review this area of life and restore the harmony - forgive whoever needs to be forgiven, and also forgive yourself. Also check - and you must be ruthlessly honest with yourself - if you have been abusing the love force in some way - using it manipulatively - using it to harm instead of to bless. And then make the correction. Chances are, if you do this the health problem will just melt away on its own. It will have no energy to support it. Even if you need the services of a health professional, the healing will go much more quickly and easily.
The second possible spiritual cause that needs investigation is your personal religion, your religious and philosophical beliefs, your view of the world and of life in general. (These things are ruled by Jupiter, your health planet). If there are false beliefs there will be much pain and suffering in the life. For a person will interpret events based on these things, will have negative emotional reactions to events that don't warrant it, and eventually this philosophical problem will also manifest in the physical body as some form of ailment. Happily, this area is important in your life these days and you are breaking with many false beliefs. I consider this a positive health signal.