### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
About 2 weeks ago, my 2 year old son slept until about 3pm, woke up, ate a little and then went back to sleep from 4 until 7. The next day he seemed fine, so I figured he was just tired. Then a week later, He developed a fever that reached abot 101 degrees (axillary). He also had what appeared to be a diaper rash and was irritable and tired for a couple of days. We gave him tylenol, treated the diaper rash and let him rest and this seemed to resolve within 48 hours. Then five days later, we noticed what appeared to be hives all over his body and face. So, we took him to a doctor and they diagnosed him with strep throat. We started antibiotics that night (Thursday). On Saturday morning, my husband said that he felt warm to the touch, but never took his temp. He just gave him Tylenol and the antibiotic. He also noticed that his gait seemed a little funny and he was crying and irritable when he woke up from his nap. This morning, Sunday, I called the doctor s office because I was concerned about rheumatic fever or some other complication of strep or something being missed altogether. The doctor finally called back this evening and stated that he was doubtful that it could be rheumatic fever but agreed to see him again tomorrow. The latest development this evening is that my son does not want to bear weight on his legs. He will not come to me when called and he only wants to sit, crawl, or be carried. When I tried to stand him up, he cried. Otherwise, his temperament is normal, he s eating and drinking and in good spirits. Do you have any ideas? Thanks, Lynette

### output:

Hi, So he had fever on & off for few days, arthralgia and a rash. The possibilities are acute rheumatic fever as you told, or it can be even myogenic arthritis. A detailed examination few lab tests will clinch the diagnosis. You may be asked for some blood tests, x-ray of limb and chest, ECG and sometimes fluid aspirate from joint.  Your doctor will guide you. Meanwhile, continue antibiotics and analgesics given. Hope I have answered your question. Let me know if I can assist you further. 