PROBLEM TO BE SOLVED: To provide skin external preparation compositions for treating head dermatitis or improving head skin quality.SOLUTION: The present invention provides a skin external preparation composition for treating head dermatitis or improving head skin quality, the composition comprising C-type natriuretic peptide (CNP) or B-type natriuretic peptide (BNP). The external preparation composition is applied to a hair loss site of the head. The composition is used in hair-growth and -restoration in a hair-loss site. The dermatitis is eczema, atopic dermatitis, or seborrheic dermatitis. The composition is a quasi-drug.SELECTED DRAWING: None【課題】頭部皮膚炎治療用または頭部肌質改善用皮膚外用剤組成物の提供。【解決手段】Ｃ型ナトリウム利尿ペプチド（ＣＮＰ）またはＢ型ナトリウム利尿ペプチド（ＢＮＰ）を含む、頭部皮膚炎治療用または頭部肌質改善用皮膚外用剤組成物。頭部の脱毛部に塗布される前記外用剤組成物。脱毛部における発毛および育毛用である前記組成物。前記皮膚炎が、湿疹、アトピー性皮膚炎または脂漏性皮膚炎である前記組成物。医薬部外品である前記組成物。【選択図】なし
