1. Sulfated hyaluronic acid for topical use for the prevention and / or treatment of inflammatory / irritating skin diseases selected from dermatitis, atopic dermatitis, photodermatitis, rash, vitiligo, eczema, psoriasis, all skin irritations associated with the activation of pro-inflammatory cytokines, such as IL-1, IL-2, IL-6, IL-7, IL-8, IL-12 and TNF, wherein said sulfated hyaluronic acid (HA) has a molecular weight in the range of from 10,000 to 50,000 Da, from 150,000 to 250,000 Yes or from 500,000 to 750,000 Yes, and a degree of sulfation equal to 1 or 3 .2. Sulfated hyaluronic acid for topical use as a hydrating agent for the treatment of pathological conditions of the skin characterized by dryness, lichenification, irritation, itching and hyperemia, inflammation and desquamation, said sulfated hyaluronic acid (HA) having a molecular weight ranging from 10,000 to 50,000 Da, from 150,000 to 250,000 Yes or from 500,000 to 750,000 Yes and a degree of sulfation equal to 1 or 3.3. Sulfated hyaluronic acid for topical use for the prevention and / or treatment of pathological conditions of the skin associated with damage to the endothelium and / or blood vessel wall, and for treating clots of fibrin and blood clots that form at the skin level, wherein said sulfated hyaluronic acid (HA) has molecular weight in the range from 10,000 to 50,000 Yes, from 150,000 to 250,000 Yes, or from 500,000 to 750,000 Yes and a degree of sulfation equal to 1 or 3.4. Sulfated hyaluronic acid for topical use as a stimulator of skin absorption of pharmacologically and / or biologically active agents, wherein said sulfated1. Сульфатированная гиалуроновая кислота для местного применения для профилактики и/или лечения воспалительных/вызывающих раздражение заболеваний кожи, выбранных из дерматита, атопического дерматита, фотодерматита, сыпи, витилиго, экземы, псориаза, всех раздражений кожи, связанных с активацией провоспалительных цитокинов, таких как IL-1, IL-2, IL-6, IL-7, IL-8, IL-12 и
