<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi my 5 year old son has very congested the past week, I think it is due to high pollen.I have tried saline nasal spray to try and relieve congestion. However in the last few days he has had a nose bleed in the morning and then twice today.. he also had few spots on his bum the last few days nowhere else just his bum. What should I do.  <response>: Hello and welcome to Ask A Doctor. I have read your query and here is my advice. He may have nasal allergies. Nose bleeds can be caused by allergy. Other signs of allergy include a personal or family history of hay fever, asthma, and eczema. Does your son also have cough, a fast respiratory rate, or his neck muscles pulling when taking a breath? These can be indications that he is working hard to breathe and are seen in respiratory infections below the nose, for example: croup, pneumonia. It would be helpful to know whether the spots on his bottom are raised, flat, circular, irregularly shaped, or itchy. Keeping your son well HY Chat Doctor. Putting a small amount of Vaseline inside the front part of his nostrils may ease the irritation. Oral medicines that can be taken at his age are: Loratadinea non-sedating antihistamine for allergy or pseudocode 