<s>[INST] I had flu symptoms then came down with a bad sore and hoarse throat for 3 weeks, then I got a fever for a day and achy joints. I now have a rash on my chest that itches alot and my entire mouth is sore with a couple cold sores, my uper mouth seems to have lots of little sore bumps, almost like bubles that feel like cold sores. [/INST] Hi Dear,Understanding your concern. As per your query you have symptoms of  chest rash and sores with itching along with mouth sores which seems to be due to impaired immune system after flu and medication after effects. Need not to worry. I would suggest you to drink plenty of water. Use oral numbing gel to avoid soreness of mouth. Keep chest area clean with soap and cold water and apply petroleum jelly. Apply moderately potent topical steroid of triamcinolone acetonide 0.1% cream twice daily at affected sites.You should visit dermatologist once and get it examined and start treatment after proper prescription. Hope your concern has been resolved.Best Wishes,Dr. Harry Maheshwari </s>