The immune system is referred to as the defense system that protects the body against different kinds of diseases. The stronger the immune system, the higher will be the chances of the body staying away from diseases. Suffering from immunodeficiency or immune system disorder is a cause of concern and must be immediately addressed. Symptoms Cold hands If the blood vessels suffer from inflammation, it gets difficult for the ears, toes, fingers, and nose to stay warm. The affected portion of the skin turns white. Slowly, the color changes into blue when these areas are further exposed to some cold object or atmosphere. When the flow of the blood becomes normal, the skin turns back to red. Medical experts refer to this as the Raynaud’s phenomenon. It is one of the most commonly observed symptoms of immune system disorder. Dry eyes When a person is suffering from an autoimmune disorder, his immune system, instead of protecting his body against diseases, attacks it. Lupus and rheumatoid arthritis are two of the most common examples of this condition. People who suffer from an autoimmune disorder tend to have dry eyes. The person will feel the presence of some grainy object when this happens.