What is this red thing like a pimple on your hand?

It is possible that the "red thing like a pimple on your hand" is caused by a number of different skin conditions. Some potential causes include:

- Folliculitis: Inflammation of a hair follicle which can be caused by bacteria or other factors.

- Contact dermatitis: Inflammation caused by substances that come into contact with the skin.

- Skin infection: Caused by bacteria, viruses or fungi.

- Boil: A deep infection of the skin and hair follicle.

- Cherry angioma: A common, non-cancerous skin growth composed of blood vessels.

- Allergic reaction: A reaction to certain foods, medications, or environmental factors.

- Insect bite: A reaction to the bite of an insect such as a mosquito, spider, or bee.

If the red thing on your hand does not improve within a few days or if it becomes painful, swollen, or shows any signs of infection, it is recommended to seek medical attention for an accurate diagnosis and treatment.