Most sebaceous cysts feel slightly soft to the touch and are not particularly hard. If a particularly hard lump appears in the area, it may be swollen lymph nodes, not necessarily a sebaceous cyst. If such an unidentified lump appears, it is advisable to visit the dermatology department of a formal hospital so that the doctor can examine it and diagnose what it actually is. If it is a sebaceous cyst, it is best to have a minor surgery as soon as possible to completely remove the material and the sac. If the lymph nodes feel particularly hard, temporary treatment with anti-inflammatory medication can be administered orally, and if they cannot be completely removed, surgical intervention may be necessary. Therefore, sebaceous cysts are not very hard and feel relatively soft; always confirm the diagnosis before treatment.