Red and itchy knees may be related to contact dermatitis, eczema, papular urticaria and other causes, which need to be analyzed according to the symptoms.
1. Contact dermatitis: If the skin at the knee comes into contact with allergenic substances such as ointment, it can cause an allergic reaction in the body, resulting in localized redness, swelling, itching and other symptoms of the skin.
2. Eczema: Eczema is caused by mental tension and other internal factors, external stimuli and other external factors caused by skin inflammation, early skin erythema can occur, can be accompanied by itching symptoms.
3. Papular urticaria: Most of them are caused by bites of bedbugs, mosquitoes, fleas, lice, mites and so on, and a few of them are related to food allergies. It can lead to red pimples on the knees and itchy masses with itchy symptoms.
It is recommended that red and itchy knees may also have other causes, you should go to the hospital in time to clarify the cause of the disease, under the guidance of the doctor for standardized treatment, so as not to delay the condition.