1. Tilting your head when nose bleeding Tilting your head backwards while pinching your nostrils, is a bloody bad advice. Why? If blood flows down someone\u2019s trachea as they\u2019re reclining, it could make it hard to breathe or cause him or her to swallow blood, which may trigger vomiting. Sit upright, lean forward and pinch your nose steadily (just below the nasal bone) for five to 10 minutes. If the bleeding persists for more than 15 minutes, see a doctor. 2. Putting jelly or ice on a burn Applying ointment can trap the heat within the burn and make things worse. Freezing the tissue with ice is also unhelpful. The goal is to return to normal temperature and the ice can make the skin too cold. Run cool (not icy cold) water on burns for several minutes. This will help the excess heat to dissipate. Don\u2019t cover a burn with a towel or blanket, because loose fibres might stick to the skin. When dealing with a serious burn, be careful not to break any blisters or pull off clothing stuck to the skin. Head to the hospital for any burns to the eyes, mouth, or genital areas, even if mild; any burn that covers an area larger than your hand; and any burn that causes blisters or is followed by a fever. 3. Wearing warm when having fever When you\u2019re ill, having fever when you\u2019re shivering at the same time indicates that your body temperature is rising. When we wrap up warmly, our temperature goes up even faster. Although the heat helps us fight infections, a body temperature that\u2019s higher than 38 degrees Celsius does more harm to the body than good. If you have a high temperature combined with convulsions, you need to get cooler rather than warmer. 4. Moving a seriously injured person If you\u2019re ever the first on the scene of a bad accident such as a car wreck or devastating sports injury, you may be tempted to try to get the person moving to make sure they\u2019re okay. But don\u2019t do it. They could have a serious spinal cord injury, and any kind of movement may result in permanent neurological damage or paralysis. The only time it is okey to move a patient like this is if there is a threat of imminent danger such as a fire, explosion, or collapsing building. The best thing is call for a medical emergency. 5. Removing gauze from a bleeding wound Clotting cause strands of blood-borne material, called fibrin, to stick together and seal the inside of a wound. Picking up the old gauze can remove them and make the wound start bleeding all over again. Just add a fresh piece of gauze on top. If the gauze does come off, apply pressure to the cut until the bleeding stops, then rinse the wound out (to prevent infection), apply an antibiotic ointment (if not allergic), and rewrap with a bandage. 6. Applying heat to a sprain. People think that they should use a warm cloth and switch between applying warmth and cold to help pulled muscles. But a warm cloth could dilate blood vessels so that blood rushes into the area and increases swelling. Apply a cold compress for 20 minutes on, 20 minutes off, to the bruise for an hour with the area immobilised. 7. Inducing vomiting after swallowing poison Vomiting can cause further injury by exposing the throat and mouth to a toxic substance. Specifically, do not have the person vomit if he or she has a burning sensation in the mouth or throat. Seek medical help immediately and if possible, have the poison container with you. That way, medical experts can identify the specific chemical involved, enabling them to provide the best medical advice. If the person has swallowed prescription medicines, have the bottle or tube handy as well. 8. Rubbing eyes to remove a foreign object This can cause a serious scratch or abrasion to the eye. Tears will wash the substance out. The only exception is if you get a chemical in your eye; in that case, flush it out with water for about 15 minutes. 9. Lying down after hitting your head Some head injuries can be serious. If you lose consciousness or have a change in your mental state after hitting your head, seek medical attention immediately. Look for signs of significant head trauma such as severe headache that doesn\u2019t respond to treatment with a pain reliever, nausea, vomiting and confusion\u2014any of these symptoms mean you need to see a doctor as soon as possible. 10. Fishing objects out of your skin yourself If you step on a piece of glass, a nail or get a big splinter, don\u2019t try to remove it yourself. You can actually damage the tissues or nerves in your body. If you have a deep foreign body, you should seek medical attention.