diamond in the rough
a good person or thing that is hidden by a rough exterior
The man is a diamond in the rough and a very gentle person.
Myth about Allergies
Allergies are a nondestructive problem
Allergies are a serious problem and should be treated effectively. If left untreated, allergies can lead to impaired quality of life, including sleep and learning ability, as well as missed school and work days. Untreated allergies can also result in chronic respiratory problems, such as asthma and sinusitis, or dermatologic disorders, such as eczema and urticaria (hives). Some allergies, such as food allergies, drug allergies, or insect allergies, can even lead to a life threatening reaction called anaphylaxis.