My son about 5 y 6 m . He is suffering from fever (104F).Main problem is his nose block .can not remove it by nessel spray pediatric .he taking breathing by mouth .sometime can not do it by mouth .what can I do?

Hi I would say go for nebulisation at a hospital, take him to the doctor. You can try few home remedies it may help.
; The following things may ease the baby but the medicines will alone cure the cold and cough. 1. Ajwain seek will help you. Keep the roasted ajwain potli under the baby's pillow.
2. Steam will also help in clear the cold and help the baby to take feed.
3. Keep the baby's head in elevated position and feed. Use nasaline drops few mins before the feed.
4. Heat mustard oil and add ajwain, massage baby's chest and back but make sure you don't apply on face.
5. Heat coconut oil and add camphor apply on baby's chest and back, not on face.
6.You can apply little lavender oil on his/her blanket, pillow and bed. Take care of the baby, Keep breastfeeding the baby.

Hi
If it's a chest congestion the fever will not subside. Please meet your doctor

Season change virals are common these days and it takes a long time for cough and nasal congestion and chest congestion to go..please ask your doctor about nebulization..also read these articles

A Homemade Cough Syrup And Other Effective Tips For Treating Cold in Kids

15 natural remedies to treat your little one's cold and cough