Your poor immunity is caused by your poor health, congenital or bad living habits. You'd better exercise and don't stay up late playing computer for a long time. Don't fall down after dinner, take a walk after dinner. Take it easy when digging nosebleeds, and wash the nasal fluid with normal saline or salt-free every morning and evening. Now it has a lot to do with nosebleeds and excessive internal heat. I feel your body is very angry. Don't eat or eat less things that fall in love with fire when eating. Eat bitter gourd every few days to get rid of fire. Don't eat anything delicious. Eating too much delicious food is not good for your health, but reduces your resistance. Eat at least two kinds of fruits every day, such as apples, pears, monkeys and peaches. Eat more vitamins such as spinach and persimmons in your diet list, and eat less greasy barbecue and fried things. You'd better read the articles on health preservation, which will be of great help to you, and your body will naturally improve its resistance. Eat less drinks and frozen food, and drink more boiled water or make tea, such as green tea. I am worse than you. My bad habits lead to chronic pharyngitis and love fire. I often have a sudden nosebleed. Once I had a nosebleed on a bus, and the scene was quite spectacular. Later, I saw a lot of things about health. I haven't had a nosebleed for years. Although pharyngitis is very severe, my throat is really not that severe. Too much nonsense. I'm 27 years old. It's never too late to mend. I hope my beautiful sister can also take care of her body and make her really less sick.