Here, almost all dangerous diseases can be attributed. A person is just born healthy (and even then not always), then he gradually goes to his death, which occurs as a result of secretly flowing forms of all kinds of sores, which suddenly and with age begin to "crawl out".
To the most unpleasant I , as an oncogeneticist, would refer to oncology. But, for example, the eye-gazers may disagree with me and will call, say, glaucoma or cataracts. And they will be right: it is not yet known what is worse than cancer or blindness.
These are primarily oncological diseases, since the first two stages proceed almost without symptoms, cirrhosis of the liver (pain begins after the disease has developed by a third), pulmonary tuberculosis can initially be mistaken for a seasonal or recurrent cold, starting miningitis often mistaken for migraine, pancreatitis (a disease of the pancreas), some confuse with hungry pain in the stomach and may also not notice.
In addition to infectious diseases, which, in principle, were referred to above, cardiovascular diseases are still proceeding quite imperceptibly. From the personal experience of buried two people from a blood clot and heart attack. A heart attack, if it is small, may not be noticeable, more precisely, the symptoms can be as with gastric suspensions or as with a rib injury or osteochondrosis, and people walk for years without knowing anything, if they are not checked. Diabetes and other metabolic disorders are absolutely invisible. But diabetes is usually treated when it is time to inject insulin, which already means that the pancreas is not working. Heparthrosis, or as it is called fatty liver, is also not noticeable. Stones are not noticeable at all, either in the kidneys or in the gallbladder, until they begin to move. That is, a person can grow decent "cobblestones" for himself in these organs, and only feel when the bile outlet is blocked or the kidneys fail. Most urologists say that the kidneys, in addition to stones, all "get sick" almost without symptoms and usually complaints begin when there are already serious destructive processes in them. Cysts and other benign tumors do not noticeably grow until the nerve or systems important for the gin are touched. That is, in principle, a lot of unnoticeable things can happen to the body if they are not periodically checked.
With many infectious diseases, some have an incubation period of up to ten years. Also parasitic diseases, cancer, mental illness. If we take in general - the philosophy of the disease, then any disease proceeds unnoticed at first Therefore, clinical examination is important.
Infectious. Everything has been said here. HIV, hepatitis as the quietest.
Oncology. The first 2 stages are often asymptomatic at all. And these are usually random finds.
Hypertension. It is sometimes manifested by headaches, vomiting. But few people in this situation would think to measure the pressure.
Diabetes mellitus. The 1st type is especially dangerous. Disease of the young and the thin. Until they tumble into someone, they don't even recognize.
Myocardial infarction, painless form. Sometimes an accidental ECG finding.
Hepatitis of non-infectious nature. The symptom that is noticed is jaundice. A very long time can pass from the onset of the disease.
Pheochromacytoma. Adrenal glands. It is manifested by extremely high blood pressure. But for this you also need to measure the pressure. And sometimes this pressure is not felt.
Myasthenia gravis. Muscle weakness. You also need to understand that something is wrong.
And many others. I threw these over the top. There are also kidney diseases, Itsenko - Cushinga, stomach and duodenal ulcers, hemorrhoids, caries, gastrointestinal diverticulosis, etc.
Hello! All infectious diseases have an incubation period - the period of time between the infection of the body and the development of the first symptoms. Each infection has its own incubation period: from several hours for influenza, up to several months for hepatitis B and several years for HIV infection. The duration of the incubation period depends on both the specific strain of the pathogen and the protective properties and characteristics of the organism. Therefore, in each case it is different. Non-communicable diseases can also develop at the initial stage without clinical manifestations. This is due to the presence of compensatory mechanisms of the organism, as well as to the fact that we feel the signs of the disease even with pronounced disorders. For example, many people do not feel high blood pressure with hypertension, increased glucose levels in diabetes, and even renal failure develops when more than half of the nephrons die. That is why it is important not to waste time and identify the disease at an early stage. In this connection, it is necessary to periodically undergo a full medical examination. To clarify the condition, it is best to seek help from a general practitioner
The period from the moment of human infection until the first symptoms appear is called incubation or latent. The duration of this period is divided into:
very short incubation period - duration from several hours to 1 day (influenza, acute respiratory viral infections, foodborne toxicoinfection);
short incubation period - characterized by a duration from 1 day to several weeks (most acute intestinal infections, plague, cholera, chickenpox, scarlet fever);
medium incubation period - can last up to several months (acute viral hepatitis B);
long incubation period - up to several decades, a person may not know about the presence of an infection (chronic viral hepatitis C, HIV AIDS, prion infections).
So, in a sense, all diseases are at first imperceptible, just depending on the type of pathogen, this inconspicuous period will be different in duration.