Itchy thumbs may be caused by atopic dermatitis, tinea cruris, and gout.
1. Allergic dermatitis: Skin allergic reactions caused by allergic substances, including hand eczema, allergic urticaria, allergenic contact dermatitis and so on. When the patient’s hands come into contact with certain allergens, skin itching can occur, but also pimples, blisters and other skin damage.
2. Ringworm: ringworm is a superficial skin fungal infection of the hands caused by dermatophytes, with a certain degree of contagiousness, which can occur in the interphalangeal, palm, back of the hand and wrist. At the onset of the disease can appear scattered small blisters, can be accompanied by hand itching, can also appear flaking, keratinized thickening and other manifestations.
3. Gout: in fatigue, high purine diet, drinking a lot of alcohol, irregular work and rest and other triggers, easy to lead to gout, can appear red and swollen hands, dysfunction, etc., some patients can also be accompanied by itching, arthralgia, and in severe cases, renal impairment can also occur.
Thumb itch has other causes such as sweating herpes, eczema, etc. It is recommended to go to the hospital in time for examination and diagnosis, and choose targeted treatment under the guidance of the doctor.