Sinius problems are caused by what ? and how does one rid of this problem can be discontinued ?

Many reasons: Allergies, anatomy, bacteria, viruses, even fungi, can all lead to sinus problems. Antihistamines & nasal steroids can help deal w/allergies as well as avoiding known allergens. You can't avoid infectious etiologies. Only surgery can "fix" anatomical issues. Antibiotics aren't necessarily the solution to acute infection. See http://goo.Gl/bjhgv for aafp's take on choosing wisely campaign.