HI, thank you for your query. It seems your daughter has Sinusitis in which there is accumulation of fluid in the sinuses (empty spaces) of the skull. some of the signs are- -Headache/facial pain or pressure of a dull, constant, or aching sort over the affected sinuses is common with both acute and chronic stages of sinusitis. this increases when affected person bends over or when lying down. -Pain often starts on one side of the head and progresses to both sides. -Acute and chronic sinusitis may be accompanied by thick nasal discharge that is usually green in color and may contain pus (purulent) and/or blood. -Often a localized headache or toothache is present, and it is these symptoms that distinguish a sinus-related headache from other types of headaches, such as tension and migraine headaches. Treatment- 1.conservative treatment consists of Nasal irrigation may help with symptoms of chronic sinusitis. Decongestant nasal sprays containing for example oxymetazoline may provide relief, but these medications should not be used for more than the recommended period. Longer use may cause rebound sinusitis. 2.antibiotics such as amoxicillin/clavulunate can be used. 3.steam inhalations etc. 4.Warm compresses are useful to relieve pain in the nose and sinuses. Saline nose drops are also safe for home use. 5. An antihistamine may be recommended for the treatment of allergies. Antifungal medicine may be prescribed for a fungal sinus infection. 6.Immunoglobulin (antibodies) may be given if you have certain immune deficiencies. 7.No special diet is required, but drinking extra fluids helps to thin secretions. 8.very rarely surgery is suggested thank you, wishing you good health