Hi Dear, Welcome to HCM. Understanding your concern. As per your query you have symptoms of sinus infection along with feeling of bad taste and bad breath and stuffy nose and weakness of legs which are symptoms of sinusitis and upper respiratory tract infection. I would suggest you to put nasal decongestant sprays for opening of sinuses. Montelukast is also effective for this. You should take steam inhalation. You should take antihistamines Levocetrizine and antibiotic such as Cephalosporin combination as infection is present. Visit ENT specialist once and get it examined. You should go for sinus X ray and CT scan done as well. You can go for drainage of sinuses to relieve pressure and surgical reconstruction of opening after proper prescription. Do warm saline gargles. Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari