My baby is 11 months old. From past few days noticing his right nostril wet in the evening. But not everyday. Sometimes the discharge is watery and sometimes its little slippery. When checking with fingers it makes little string. Also, if the liquid dries in nose it makes white residue. No history of fall. But baby is having hypertonia issue for which doing physiotherapy. Mri eeg all ok. Can this be csf leak? Does csf leak makes white residue when dried? Please reply