Cancers live their lives through their stomach. They have a wonderful sense for the taste, texture and fragrance of the food they eat. Milk and dairy products are so important to you. However, dairy products can get you into a real jam too, and in more than one way. Cancer also has ruler-ship over the "sacs" of the body. The eyeballs, the cheeks of the face, the uterus and stomach are all sacs of some kind that hold something. They are all under Cancer's domain and these consequently become the weak points of this sign's superstructure.
Usually, Cancer's main problem comes from the stomach or digestive region, Cancers are more prone to cataracts and glaucoma than a lot of other zodiac signs, simply because it has ruler-ship over the eyes and everything that goes on with them. Heave a sigh of relief--you're not getting the disease cancer because you were born under the sun sign of Cancer!! It's just a coincidence that is meaningless, thank goodness. Cancer can't help but be super emotional because your ruler is the Moon, which astrologically rules our sub-conscious and emotions/feelings. There's no magic "pill" to deal with our emotions! But poor Cancer has his and her hands full with their vibrant mass of constantly shifting feelings, intuition, and emotions. Hence they need to keep their emotions under check.