Tension in the abdominal area can happen as energy begins to move in the body, and the manipura chakra begins to open. Typical symptoms include anxiety, stress, feelings of vulnerability. It can also make you feel slightly sick
with. As the chakra opens more fully and becomes more balanced, you feel open, sensitive and more connected to people on an emotional level.
Spinal breathing pranayama can open this chakra (just as it can open all the chakras) and it is a good sign that the practice is working.
As the second chakra opens it can create strong sexual desire which can feel overpowering at times. This is another symptom of purification happening in the lower chakras.
As things progress, your heart will begin to open and flower and strong feelings of Divine love will pour out of you.
Focusing on the hara may not be the best thing to do at this time, as purification needs to happen throughout the body, without fixating too strongly on any one aspect. It is good to trust the process, even if it feels a bit shakey at times.