<s>[INST] i feel prominent depressions in my skull in several areas in several times, it happens when i feel weak or take less nutrition as soon i take my diet better it diappears but it appears it make me uneasy and concious.please can you tell me the reason behind ... [/INST] Hello, Depressions in the skull (or ridges) are very hard and calcified regions of bone formed over long periods of time.  They are actually just like fingerprints.  No 2 skulls are identical. They cannot be altered except by way of a hard blow to the head that could cause a fracture and then, scarring, or surgery where a piece of bone is actually taken out. Your levels and stress over these changes is what's making you feel this way but be certain that your skull is perfectly normal and without such interrupted changes. You may try focusing on doing some morning breathing or stretching exercises every morning when you awaken. This will help you feel more energetic and stimulate your appetite. It will always help you focus on the activities you need to accomplish during the day better and reduce the need to look for what is and always be there to be certain. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Dariush Saghafi, Neurologist </s>