My daughter is 3 months old and she is very tense, always has her fist clenched and toes curled and just stiff all the time! she will not relax!

Well child checkups: During the first 2 years of an infant's life, they are seen often to make sure they are growing and developing properly. While the features you are describing can be a variation of normal, I recommend he/she be seen and followed by a Pediatrician. If you don't have a well appointment soon, please call to make a visit to discuss your concerns. Closer monitoring or a referral may be needed.

Too tight: By three months she should not have tight fists and curled toes all the time. A milestone at two months is hands unfisted half the time. Her tone is too tight and she needs an evaluation with her doctor and referral to a neurologist.