It's balanit, eczema, psoriasis, allergy or what?

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or a long time I have it, Sometimes especially when I drink some beers and smoke. my genital parts can turn to dry and itchy. Also It's kind of funny but when after the pooping the glans skin issue turn to more obvious. I'm a really allergic person to dust, grass and lots of things. I used to use ventolin inhaler for a at least 10 years. What do you think about to the photo? Have you experienced this kind of disease? So what should I do?