Hi, treatment for a rash and sore, swollen throat depends on the cause. It sounds like when your son had his rash a doctor prescribed antibiotics because she thought it was a bacterial infection. Antibiotics reduce a bacterial infection’s symptoms and duration. Please read the article, "What's Causing My Rash and Sore, Swollen Throat?" at https://www.healthline.com/health/rash-and-sore-throat for some useful information.
Ultimately please take your daughter to a local health care provider to rule out the common causes of her symptoms like a bacterial infection your son likely had or strep throat. Could you take your daughter to the same doctor who saw your son? Your local health care provider should be able to test using a throat culture. They will run a swab over the back of her throat to collect a sample to test for strep throat bacteria. With a rapid strep test, the health care provider will get the results within minutes.
Some tips from the article include asking your daughter to avoid scratching her rash to minimize its spread and prevent it from worsening and becoming infected. Keep the area dry and clean, using unscented, gentle soap and warm water. Applying calamine lotion or hydrocortisone cream may help reduce and soothe the rash.
Gargling with warm salt water can soothe her sore throat. Resting and drinking plenty of fluids may help sustain the energy her body needs to heal. If she develops a swollen throat rapidly and has difficulty breathing, she should be evaluated immediately in an emergency room.
I wish you and your family all the best and hope some of this information has been helpful.
thank you so very much for your response , but thr infection my kids have is not normal or common around here, I haven't see such a skin infection that start from around the chest then up to the nick then behind the knees . the rashes color start as tiny red then changes color to dim yellow then within hours get to the face around nose and mouth and turn to milky yellowish color. I searched I couldn't find anything like it other than impetigo.
about taking my kids to a local clinic or a hospital , unfortunately there is none around here, the only and closest doctor we have here is a general doctor (that what he says, not sure ,) the nearest city that has some hospitals (1 hospital , many private clinics ) is not that far , just about 12 miles if you are lucky to pass the war zones and check points from both battling sides asking you ( whom are you with) they don't care about any emergency you are in .
anyway , thank you very much , I did some search and I had to have some dermatologist prescribe an antibiotic to my son, ( that was throu WhatsApp messages ) she prescribed those antibiotics after she so many questions and saw the pictures of the rashes throughout the stages since it started till it got to the face .
the after taking the medicine , my son started to feel better but my daughter started to feel sick and she couldn't eat for 2 days because of her throat , she couldn't swallow food, and again she started getting rashes from same starting point around the belly and the chest , It looked like measles , but I just bought the same antibiotic for her and start using it , it's been now 2 days she better than she was before .