If the skin is slightly flaky all over the body without any obvious itching, erythema or exudative changes, it is possible that ichthyosis is caused by genetic factors, and its main manifestation is dry skin with slight flakes and slight itching in individuals. If you want to improve the symptoms, you can choose to apply moisturizer, or you can apply adapalene gel to improve the symptoms. If the skin on the body is erythematous-like changes, on top of the erythematous spots appear thick silvery-white flakes and then scratch the flakes with hands to easily fall off, you can see bleeding spots on the erythematous spots, consider that it may be psoriasis, there is no way to completely cure it, you can choose to use carbotriol ointment or the use of hormonal creams such as mometasone furoate to apply can get some improvement, once the immunity is reduced, poor rest, sleep deprivation, and so on, Sore throat, cold and fever will likely relapse again.