4 year old with temp of 102.3 and lower back pain. What could be wrong?

See a pediatrician. . Right away 4 year olds should never have back pain especially with a fever. Could be benign like the flu. But could also be a kidney infection, of spine abscess.
Several things... Several things could be wrong, but with a fever that high in a 1 year old, you should be checked out by a physician without delay. Call your physician on call or go to the er/urgent care.
Viral infection. Is on the top of my list. In case the child continues to have a fever over 3 days or noticeable change in child's general well being occurs, seek a medical attention.

Related Questions

I have fibroid and lower back pain and period stop coming on and not having a bady what's wrong and 37 years old?

Wait 3 months. If you don't have a period for 3 months or more i strongly recommend you go see your gynecologist. If pain is not relieved by taking over the counter Motrin or aleve, (naproxen) your abdomen is swollen you need to be seen. Read more...

13 year old has recurring lower back pain, what could be the causes and treatments?

Are you athletic? There a lot of reason for low back pain in your age group, the most common are stress injury to lower lumbar vertebra---the key word is recurrent--need careful hx, exam, x rays--ask your general doc first. Read more...
Several possiblities. Muscular strain, lumbar ligament inj which is failing to completely heal, si jt. Locked, lumbar vertebral dysf, quadratus lumborum muscle contracture.Must consider other med possibilities, as well, such as kidney problems.A thorough history & phys, incl. Hands-on osteopathic exam may elucidate cause.Osteopathic manipulation or even prolotherapy may prove helpful, if jt., muscular, or ligament cause. Read more...
Could be..... . I would note a disc herniation is rare at this age but a spondylolysis/spondylolithesis or benign tumor like an osteioid osteoma could be present. Sometimes autoimmune diseases like rheumatoid arthritis or infection can present like this, initially. A referred pain from a kidney problem/infection or GI problem may also be in the list of possibilities. He needs to be seen if pain restricts him. Read more...

What could be causing my 3 year old sons lower back pain?

See a pediatrician. It is not customary for 3 year old kids to complain of back pain. Hip joint infection or back infection etc can be possibilities. Make sure he does not have fevers and is not refusing to walk or having night time pain etc. He would benefit from a pediatrician or an orthopedic evaluation. Unless this was a short lived one time complaint. Read more...

My 9 year old son has recent lower back pain and now says that the pain is radiating up his back and off to his right side. What could this be?

Back pain. I'm sorry but there's two little information to give responsible answer. In these situations the patient has to be examined. Read more...
See pediatrician. Low back pain with radiation to the side in a 9 year old is unusual; it could be a muscle sprain or a slipped vertebral disk. He should see his pediatrician who may refer him to a specialist if he needs to. Read more...
Many Causes/M.D. There are many conditions that this may be related to. I would advise an assessment of his spine, nervous and muscular systems. Other causes may involve a kidney injury or infection. Read more...