When not everything is in order, the body first signals this health. Often small "problem" we do not pay attention to the writing off stress and fatigue. But sometimes it's better to take them seriously. What symptoms indicate a dangerous disease? Listen closely to the body's signals and do not delay visit to the doctor.
When to see a doctor at an early stage of the disease it is better and more efficient to treat than advanced. What should pay attention to? 
Weight loss
You do not go to the gym and do not pace yourself diets and weight is reduced? Pay attention to this symptom. Sudden weight loss within 6-12 months more than 10% of your body weight can indicate serious disease. Perhaps you have disrupted thyroid, there is a hidden disease of the liver, or any tumor overtaken by depression. It is better not to postpone the visit to the doctor and to come to the consultation as soon as possible.
Fervescence
If low-grade - 37.5 degrees - the temperature is kept for two or three weeks, it may be indicative of some deficiencies in the body. Increased body temperature can indicate an underlying infection, e.g., genito-urinary tract or tuberculosis. Also, the presence of malignant disease.
Changes in the gastrointestinal tract
Any unexplained change in bowel habits may indicate dangerous diseases. Constipation or diarrhea, the average intensity over a week, a strong watery diarrhea for more than two days, feces mixed with blood, heartburn without reference to the food eaten - it can talk about serious inflammation of the intestines and even the presence of Oncology.
Headache
You began to torment weak or strong headache? Seizures are accompanied by one of these symptoms: numbness, fever, rash, confusion, hallucinations, heart pain, vomiting? Such symptoms can be caused by many serious diseases: stroke, meningitis, brain tumor, brain concussion. Turn necessarily a physician for a complete examination of the head.
You have problems with memory
You can talk about anything and dramatically losing the essence of the conversation? It would seem, nothing serious. Once these symptoms can occur after minor stroke and circulatory disorders of the brain. It is better to tell the doctor about them.
You constantly want to sleep
In the morning wake up with difficulty, and a day feel overwhelmed. If you are in this snore at night - it may indicate sleep apnea sleep time - short stop breathing. Immediately consult a doctor. Sleep apnea increases the risk of cardiovascular disease and stroke.
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