Dampness at the base of the thighs is considered to be due to physiological factors, eczema, ringworm, etc. The exact situation needs to be confirmed based on your own condition as well as the results of the examination. 1. Physiological factors: If you are fat, the inner thighs are not breathable, or the clothes you wear are too tight in too hot a weather, it will lead to the phenomenon of dampness at the base of the thighs. 2. Eczema: When eczema symptoms appear at the thigh root, the inflammatory reaction makes the skin blister, ooze, and secrete too much liquid, which is not cleaned up in time, thus leading to the symptoms of dampness at the thigh root. 3. Ringworm: When the thigh root is infected by fungus causing symptoms of ringworm, it leads to inflammatory oozing from the thigh root, which accumulates at the thigh root, thus leading to the phenomenon of dampness at the thigh root. When the symptoms appear, you should go to the hospital in time for examination, and according to the examination results as well as the doctor’s instructions for targeted treatment.