Erythema of the skin without pain or itching may be caused by nevus erythematosus, psoriasis and pityriasis rosea, which can be relieved by laser treatment and medication according to different causes.
1. nevus erythematosus: it is a kind of micro-venous vascular malformation in the superficial dermis, which often appears at birth or soon after birth, usually occurs on the face, neck, scalp and other parts of the skin, forming a light red or purple-red spot that is painless and itchy, which can be treated by pulsed dye laser.
2. Psoriasis: Erythematous scaly disease caused by skin immune function disorders and abnormal differentiation of keratinocytes, which can also form painless and itchy erythema at the early stage. It should be treated with glucocorticoid creams such as halometasone and mometasone furoate under the guidance of dermatologists after complete examination and clear diagnosis, and it can also be combined with vitamin D3 derivatives such as carbotriol at the same time.
3. pityriasis rosea: this is a relatively common skin immunity inflammatory disease, preferably in the trunk and proximal limbs, the size varies, presenting rose-colored or reddish plaques, which are covered with furfuraceous scales. It is often associated with upper respiratory tract infections and immune disorders. Usually can be self-healing, serious cases should be timely medical treatment.
Patients with painless red spots on the skin that do not easily fade should go to the hospital in time to avoid delaying the condition.