@partha Many physicians still hold beliefs despite the existence of clear evidence that they are incorrect.
These long-held pieces of dogma – or "medical myths" – were engraved during training or early in the careers of many physicians, and are difficult to overcome.
The myths persist because medical professionals get taught one way in training, given a 'truth' or 'This is the way we do it,' and then do not ever rethink, 'Is it true?' Studies pop up to question conventional wisdom, but unless the studies get highly publicized, they aren't noticed.
Three of what considered to be some of the some of the medical myths that are in greatest need of being dispelled.

Shellfish Allergy and Radiocontrast
A myth persists that people with a shellfish allergy could have an allergic reaction when a contrast agent is used for a scan. This belief arose, because fish and shellfish contain iodine, and allergic reactions to seafood are fairly common, and contrast agents contain iodine, too.
The belief is widespread, with 65% of radiologists and 88.9% of interventional cardiologists saying they ask about seafood or shellfish allergies before administering contrast. And a third of radiologists and 50% of cardiologists said they would withhold contrast media or recommend a premedication for patients with such an allergy.

But the belief makes no sense, Iodine is present in many other foods, including milk and bread, and allergies to shellfish are because of parvalbumin protein and tropomyosins, not iodine.

Colonoscopy Dogma
It's been long believed that people need to be on a clear, liquid diet for 1 or 2 days and need to drink a bowel-prep liquid before a colonoscopy.
But the evidence shows this isn't necessary, he said.

A 2020 study found that a low-residual diet, allowing foods such as meat, eggs, dairy, and bread, were comparable to the clear liquid diet in terms of bowel prep and detection of polyps during the exam. The patients on the low-residual diet had less nausea, less vomiting, and less hunger, and expressed more willingness to have a repeat colonoscopy.
Metronidazole and Alcohol
There is a belief that patients shouldn't drink alcohol if they are taking metronidazole, because of concerns about nausea, vomiting, flushing and other symptoms – also known as a disulfiram like reaction.

Case reports have been published, but the cases were presented as though a metronidazole-ethanol reaction was an established fact, and the authors didn't provide evidence to justify this.

But it's been shown in rat models that metronidazole can increase levels of acetaldehyde, the trigger of symptoms, in the colon, but not in the blood. And in a small placebo-controlled, randomized trial, six people were given metronidazole and ethanol and, after regular blood testing, no difference was seen in acetaldehyde blood levels, vital signs, or symptoms.The Centers for Disease Control and Prevention has said that avoiding alcohol while taking metronidazole is unnecessary.

Sinus Headaches
Contrary to common belief, headaches thought to be "sinus headaches" are usually migraine headaches. In one study, 2,991 patients with six headaches in the previous 6 months were self-diagnosed or were physician-diagnosed with sinus headaches. But 88% of these headaches met the International Headache Society criteria for migraine headache.

The clinicians should reconsider the evidence regularly when deciding how to treat their patients, and not rely on bits of dogma.

Results of a meta-analysis carried out by a French team indicate that there is a link between a father's or mother's autoimmune disease and their children's risk of developing certain neurodevelopmental disorders (autism spectrum disorder [ASD] and attention-deficit/hyperactivity disorder [ADHD]). This meta-analysis is the first to separately explore the link between a father's or mother's autoimmune disease and the onset of neurodevelopmental disorders in their children.

@ricky Through fasting intervals as short as those achievable through a 16:8 restricted feeding scheme, a substantially and measurably increased fat tissue mobilization ― as indexed by increased ketone body production ― may occur. The quite high subjective hunger scores at the end of the fasting sessions should also be taken into account, since the feeling of hunger may obviously drive the subsequent caloric quantity intake

Xerosis, UV-related skin disorders (tanning, photomelanosis, acute and chronic sunburn, polymorphic light eruption, chronic actinic dermatitis, actinic cheilitis, etc.), cold injuries (frostbite, chilblains, acrocyanosis, erythrocyanosis, etc.) nail changes (koilonychias), airborne contact dermatitis, insect bite reaction, and skin carcinoma (basal cell carcinomas, squamous cell carcinomas, and also rarely malignant melanoma) are the dermatoses seen in high altitude areas. Why the mountain people get wrinkles on their face?

@harman While much of quantum computing’s potential is still to be actualized, past performance has already caused significant optimism for applications in medical imaging, genomics, and drug discovery. A revolutionary amount of computational power may soon make it viable to consider all possible outcomes of incredibly complex scenarios, such as drug interactions and comparisons, or more rapidly and cheaply sequencing human genomes. The deluge of data that comes with such discoveries can be quantumly computed to further other discoveries. Already, some tech giants like IBM offer quantum cloud computing as a means for people to familiarize themselves with the format and capabilities of such technology. That said, the real applications and heavy lifting will require substantial development and investment. There may not be significant concrete gains in quantum computing for 2019, but there will be lots of investment and boardroom discussions about it.

@harman Eating well also prevents pregnancy complications, including preterm birth, high blood pressure, and preeclampsia. During pregnancy, women should ensure they are getting enough vitamins, minerals, proteins, fats, and carbohydrates to encourage healthy growth. However, the body needs slightly more calories during the second trimester. Iron helps to carry oxygen around the body. During pregnancy, iron supplies oxygen to the developing baby. If a diet is lacking in iron, it could cause anemia, which increases the risk of complications, such as premature birth and postpartum depression.

Hello, I am looking for natural sources of anti-oxidants. Is rose petal good source of antioxidant? Please elaborate on this.

Hello, I am a mother of two daughter. As dengue cases are rising day by day, I am worried. I am a single parent. Please provide me some guidelines on how to prevent dengue fever?

@alaap Controlling BP in patients with diabetes reduces the risk of cardiovascular events, but the available data are not sufficient to classify this patient with respect to BP status. The reading taken while reclining in the dentist’s chair was likely inaccurate. A single reading in the medical clinic, even with correct technique, is not adequate for clinical decision-making because individual BP measurements vary in unpredictable or random ways. It is recommended that one use an average of 2 to 3 readings, separated by 1 to 2 minutes, obtained on 2 to 3 separate visits. Some of those readings should be performed outside of the clinical setting, either with home BP self-monitoring or 24-hour ambulatory BP monitoring, especially when confirming the diagnosis of sustained hypertension. Note that a clinic BP of 140/90 corresponds to home BP values of 135/85. Multiple BP readings in the clinic and at home allow for classification into one of the following categories

Hello, my 9 year old son is suffering from repeated sinusitis. His symptoms include nasal inflammation, thick, discolored discharge from the nose (runny nose), drainage down the back of the throat (postnasal drainage), stuffy (congested) nose causing difficulty breathing through nose. Also pain, tenderness and swelling around eyes, cheeks, nose. His sense of smell and taste has also gone reduced. Someone suggested me that it might be due to deviated nasal septum. Can anyone please explain to me this?