Small bumps on the face of the hand, more knot together thick itchy, may be caused by ringworm, hand eczema, sweat herpes and other diseases. 1. ringworm: ringworm is a fungal infection of the superficial skin of the hands caused by fungi, the hands can appear blisters, flaking, skin roughness and thickening, pimples and other lesions, ringworm patients may appear on the hands of the small bumps, connected to a piece of the situation. 2. Hand eczema: hand eczema is a kind of skin inflammatory reaction, mainly manifested as aggregated pimples or blisters, spreading to the face of the hands and wrists, accompanied by varying degrees of itching, patients with small bumps on the face of the hands may be caused by hand eczema. 3. Sweat herpes: Sweat herpes is a symmetrical blistering skin disease that occurs on the palms of the hands, soles of the feet, and lateral edges of the fingers and toes, and is mainly manifested as small blisters the size of grains of rice, which are slightly higher than the skin, and the small blisters can be gradually melted into large blisters, accompanied by varying degrees of itching and burning sensation. It is recommended that patients seek timely medical examination, clear causes for targeted treatment, pay attention to the observation of hand changes in life, follow the doctor’s instructions for regular review.