What is the reason why the doctor feels that the toenails are yellow and have lines? Do you want to buy any medicine?
I don't know how long this situation has lasted. At present, just through your description and pictures, it doesn't rule out the existence of fungal infection, that is, the formation of gray nails. In this case, consider the possibility of cross infection. It is suggested to actively give antifungal treatment.
The nail cap on your feet turns yellow and has lines. According to the photos, it is preliminarily considered that the gray nail is caused by fungal infection. It is recommended that you should drink more water and rest, eat more fresh fruits and vegetables orally, take antifungal drugs, and avoid spicy seafood,
From the current photos, there are yellow lines on the nail cap, which may be the performance of onychomycosis caused by fungal infection. It is suggested that you can go to the hospital for fungal test first. If you are diagnosed with onychomycosis, you can use iodine tincture externally, oral itraconazole and other drugs.