White grains of rice on the scalp generally refers to the presence of rice-like material substances on the scalp, which may be due to seborrheic dermatitis, ringworm of the head, head simple furfura and other diseases.
1. Seborrheic dermatitis: the cause of the disease is not clear, mostly considered to be related to genetics, diet, immune dysfunction and other factors. Patients often appear chaff-like dandruff, and in combing hair will appear gray-white dandruff, which can be manifested as a white granular material on the scalp. Some patients also appear local erythema, accompanied by itching, erosion, oozing and other symptoms.
2. Ringworm of the head: mainly due to the skin ringworm bacterial infection, belongs to the infectious disease. And low immune function, direct contact with patients are risk factors. Patients often manifest as yellow ringworm, white ringworm, black spot ringworm and pustular ringworm, of which white ringworm often in the beginning of the lesion will show a collection of red pimples, but with the development of the disease, the surface will be covered with gray-white scales. Some patients can also appear on the scalp with the phenomenon of white-like material grains of rice.
3. Head furuncle: the cause of the disease is not very clear, and is considered to be related to pathogenic bacteria infection, sebaceous gland secretion, heredity and other factors. Patients often appear in the scalp bran-like or powdery scales, can be white or grayish-white, which can be manifested as white grains of rice on the scalp. Itchiness may also be present, and hair loss and thinning may occur if the condition persists for a long period of time.
In addition to the above diseases, head lice eggs, folliculitis, etc. can also appear white grains on the scalp. It is recommended that patients with white grains on the scalp should seek timely medical examination and treatment after the cause of the condition is clarified.