My daughter who is 12 years old is suffering from severe sinus. Please let me know if she can take nasal sprays and steam inhalation when she's fasting.

Since it’s a medical necessity, she can use the spray. However, if the spray goes directly into the lungs, the fast is valid. If some of it swallowed down the esophagus then she breaks her fast and makes it up after the month of Ramadhan. She does not need to pay any Kaffara