Skin darkness and melanin precipitation may be caused by post-inflammatory hyperpigmentation, acanthosis nigricans, skin amyloidosis, etc., which can be improved through medication, physical therapy and other measures.
1. Post-inflammatory hyperpigmentation: In the case of eczema, tinea corporis and other diseases, pigmentation may remain after the inflammation subsides, resulting in dull skin and melanin precipitation.
(1) medication: hydroquinone cream can be used externally to have a certain effect of lightening pigmentation, but also oral vitamin C and other drugs to regulate.
(2) Physical therapy: you can take strong pulse light and other lasers to lighten the pigment.
2. Acanthosis nigricans: the cause of the disease is not clear, may be related to drugs, visceral tumors, heredity, obesity and other factors. We should actively remove the causes of the disease, such as controlling the diet, exercising more to reduce weight, stopping the use of related drugs, and actively treating the visceral tumor disease and so on.
(1) Drug therapy: If it is caused by benign reasons, it can be used externally such as Vitamin A acid and Carbotriol.
(2) Physical therapy: Freezing, electrocautery and laser can be taken as physical therapy.
3. Skin amyloidosis: the cause is unknown, mostly related to genetic and metabolic disorders.
(1) Drug therapy: local application of retinoic acid cream, salicylic acid ointment and other preparations; severe itching, can take loratadine, cetirizine and other antihistamines to reduce itching symptoms.
(2) Physical therapy: you can take freezing, laser and other physical therapy measures.
Skin darkness melanin precipitation, there may be other reasons need to go to the hospital for examination, clear cause of the active diagnosis and treatment. The above drugs should be used for treatment as prescribed by the doctor.