The development of pus on or in the finger is caused by the accumulation of bacterial pathogens on a wound, usually after an injury. Pus itself consists of white blood cells and other immune cells in the body.
Immediately after a mosquito bite, local swelling can often occur at the site of the bite. The area is still noticeable by reddening, overheating and itching. If the symptoms are extremely severe, the sting must be infected