Heat and pain on the bottom of the foot, commonly due to the following causes: 1, the most common is plantar tendonitis, may be due to the usual excessive activity, such as frequent weight walking, up and down stairs, hiking, or in a short period of time, strenuous sports activities, are likely to cause plantar congestion, so that the plantar tendon membrane is subject to more stress, there will be fascial strain, aseptic inflammation, in the occurrence of inflammation of the local When inflammation occurs, local redness, swelling, fever, etc. will appear. At this time, first of all, we must pay attention to avoid sports, while actively giving anti-inflammatory, pain relief treatment. 2, also consider whether the local skin allergies, such as chemical allergies or mosquito bites, the above can cause acute skin hypersensitivity reactions, manifested as plantar fever, pain, itching, at this time, we must go to the dermatology department for consultation and treatment.