If there are hard bumps in the flesh of the thigh, there are several possibilities: 1. The most common factor is infectious, the skin of the thigh is susceptible to infections, such as bacterial, viral, fungal and other pathogenic microbial infections that cause localized lumps, bumps and bumps, redness and discoloration of the skin surface and pain on pressure or pus. 2. The surface of the thigh is smooth and well-defined, and when touched there are hard bumps, but the texture is hard and there is no septic infection. 3. A hard bump inside the thigh is not excluded as a malignant tumor, so if there is a hard bump inside the thigh, it is recommended to go to the hospital for an examination.