Toes can be painful when they are hot. Consider the following reasons: First, acute arthritis attack in the toes: It may be due to cold invasion or cold wind or cold water stimulation, which can cause the synovial membrane of the joint to be irritated and lead to increased synovial fluid, as well as an acute attack of arthritis, which can manifest as redness, swelling, heat and pain in the toes. Second, other factors: consider local chemical allergies or mosquito bite allergies, in the case of skin allergies can appear redness and swelling of the toes, accompanied by pain, sometimes accompanied by itching of the skin. In this case, it is important to go to the dermatology department early and actively carry out anti-allergy treatment.