Whitish or yellowish nails can occur due to onycholysis. This means separation of the nail from the nail bed. The color you see is air beneath the nail. The treatment is to trim the nail short, don't clean under it, polish if you want to hide the color, and wait two to three months. Persistent onycholysis can make the nails susceptible to fungal infection.

Not all cases of OM require treatment with medication but if your doctor has confirmed you have OM and require treatment, they may prescribe an oral antifungal medication (terbinafine, itraconazole*) based on the type of fungus causing the infection. If you are unable to take oral antifungals or have a mild-to-moderate case of OM, your doctor may opt for a topical therapy (ciclopirox, efinaconazole*) that is applied to the affected nail(s) directly.
For more severe cases, oral antifungal medications might be required. These include fluconazole (an antifungal agent also commonly used to treat thrush), terbinafine (a broad-spectrum antifungal) and griseofulvin (usually used for skin infections). The latter is a very old drug and carries the risk of causing damage to the liver. Terbinafine is most effective and therefore is the preferred oral treatment. A 12-week course cures 70-80% of cases by causing the fungi’s cells to leak and die. It can, however, cause gastrointestinal side effects and depression.
​The American Orthopaedic Foot & Ankle Society (AOFAS) offers information on this site as an educational service. The content of FootCareMD, including text, images and graphics, is for informational purposes only. The content is not intended to substitute for professional medical advice, diagnoses or treatments. If you need medical advice, use the "Find an Orthopaedic Foot & Ankle Surgeon" tool at the top of this page or contact your primary doctor. 
When visiting a doctor, the basic diagnosis procedure applies. This includes checking the patient's medical history and medical record for risk factors,[11] a medical interview during which the doctor asks questions (such as about itching and scratching), and a physical examination.[11] Athlete's foot can usually be diagnosed by visual inspection of the skin and by identifying less obvious symptoms such as itching of the affected area.
Oral antifungal therapy has a high cure rate, depending on the medication. It can take nine to 12 months to see if it has worked or not, because that is how long it takes for the nail to grow out. Even when therapy works, the fungus may come back. Currently, an oral antifungal therapy is considered the best treatment for toenail fungus because of higher cure rates and shorter treatment duration compared to topical therapy.
*All medications have both common (generic) and brand names. The brand name is what a specific manufacturer calls the product (e.g., Tylenol®). The common name is the medical name for the medication (e.g., acetaminophen). A medication may have many brand names, but only one common name. This article lists medications by their common names. For information on a given medication, check our Drug Information database. For more information on brand names, speak with your doctor or pharmacist.

Ringworm, also called tinea corporis, is not a worm, but a fungal infection of the skin. It can appear anywhere on the body and it looks like a circular, red, flat sore. It is often accompanied by scaly skin. The outer part of the sore can be raised while the skin in the middle appears normal. Ringworm can be unsightly, but it is usually not a serious condition.
Français: se débarrasser d’une onychomycose, Italiano: Liberarsi dall'Onicomicosi, Español: eliminar los hongos de las uñas de los pies (onicomicosis), Deutsch: Zehenpilz loswerden, Português: Se Livrar de Pé de Atleta, 中文: 治疗甲癣, Русский: лечить грибковое поражение ногтя, Nederlands: Van schimmelnagels afkomen, Bahasa Indonesia: Menyingkirkan Jamur di Jari Kaki, Čeština: Jak vyléčit plíseň na nehtech, ไทย: กำจัดเชื้อราที่เล็บเท้า, हिन्दी: पैर के फंगल संक्रमण से छुटकारा पाएँ, العربية: التخلّص من فطريات الأظافر, Tiếng Việt: Điều trị Nấm móng chân
Because fungal spores can remain viable for months in these environments, frequent exposure can increase the risk of infection (and re-infection). Fungal spores can be picked up in many ways – such as wearing shoes that harbour the organism, by walking barefoot in areas where the fungus is prevalent (especially public showers and locker rooms), by wearing wet shoes or socks for long periods, through previous injury to the toe or toenail that opens a path for easy entry of the fungus, or by wearing improperly-fitting shoes.
Food intolerances — Some yeast infections are due to food allergies. Try to avoid foods that cause negative reactions of any kind and pay attention to symptoms you experience when eating things like dairy, eggs, certain nuts, wheat-containing foods and grains. If you think you have a food allergy or sensitivity, try an elimination diet to figure out what foods are causing intolerance and work on removing those foods.
Nail fungus, or onychomycosis, is a common skin condition where a fungus infects a part of the nail including the bed, matrix, or plate.[1] Nail fungus can result in cosmetic concerns, pain, and discomfort as well as end up affecting your everyday activities. If it is a severe infection, it may cause permanent damage to your nails or may spread beyond your nails.[2] If you know you have toenail fungus, you can follow a few simple steps to get rid of it and return your toenail to its former health.
What you need to know about fungal infections Some fungi occur naturally in the body, and they can be helpful or harmful. An infection occurs when an invasive fungus becomes too much for the immune system to handle. We describe the most common types, including yeast infection, jock itch, and ringworm. Here, learn about risk factors and the range of treatments. Read now
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