Prolonged Muscle stiffness experienced since ard 4yo. Initially it happened only after I take my asthma tablet. But as I grew older, it starts occurring more frequently without any cause. Usually, it affects mainly my hand and leg muscles and I find difficulties walking up the stairs, getting up from seats etc. Other times such as before period, it can affect my jaw when I eat, neck muscles as well. The severity varies but I can still carry out daily activities normally.