Some may be urticaria, so it is recommended to take more allergic drugs.
Sometimes because the hair on the arm can't grow, little red pimples appear in the pores.
Simply put, it is hair follicle keratinization and lack of vitamin A.
Use some ointment, which contains vitamin A. Take a bath and scrub at ordinary times, and exfoliate your body if you have nothing to do. Pay attention to moisturizing, and the bath water should not be too hot. Water that is already dry and too hot will remove body oil. Usually eat more foods containing vitamin A, then use some skin care products and add some vitamin A fat (liquid) to the emulsion. I usually watch TV when I have nothing to do, put oil on my legs while surfing the Internet, and then massage it until it is absorbed, five or six times a day. There is also exfoliation, you can't go every day, for fear that your skin can't stand it. Go once every three days and once a week after your skin gets better. Finally, you can buy any kind of oil, but the most important thing is to apply it many times a day, at least once in the morning and once in the evening, and then put on sports socks (if you are not used to wearing socks at night, you can cut off its head to expose 1/3 soles, which is the same as wearing gloves after hand protection). As for frosted products, you can use bath salt, or you can put some sugar in the bath (white sugar is slippery after washing) and then start rubbing. After 2 weeks, you can find that your skin has become soft and smooth, but those small spots can only be improved but not eradicated. But stick to it. Over time, it will change completely.