Hello Dear Thanks for writing in health care magic. I would be happy to help you. one thing you which you have not mentioned that for how long time you are experiencing metallic taste and oral ulcers. I am asking this because sometimes use of chlorhexidine mouthwash also causes metallic taste. Azelect medicine also tends to cause dryness of mouth in few cases which further causes increased microbial activity inside the oral cavity which can be a cause of your swollen gums. Now coming towards oral ulcers. It is usually apthous stomatitis or herpetic stomatitis. But it may be due to other reasons also. Usually it heals without any treatment within 7-10 days. Here I am advising few things that may fasten the healing process • Avoid hot and spicy food and beverages for few days. • Eat more green leafy vegetables. • Rinse your mouth with Betadene/Viodine/Betakind garhle (contains povidone iodine solution) easily available in medical stores, twice daily. • Apply topical gel like Metrogyl-Dg Forte or Rexidine-M gel (commonly chlorhexidine and metronidazole combination). Use it thrice daily for 7-8 days. • Take Vizylac capsule (lactobacillus sporogenes) twice daily for 5 days. Most probably symptoms should start subsiding soon. If not, then get an appointment with your dentist and discuss about the other investigative methods by which accurate diagnosis can be made and treatment plan can be made. Hope this will help you. If there is any more query or question regarding this in your mind, you are free to ask any time. Thank You and Take Care Regards