Hello, as you said there is only numbness that means it is due to having bad posture and may be vit B12 deficiency.. When you left your hand in same position without any movement then it will cause pressure on nerve results in entrapment or compression. If there is pain and needle sensation with numbness then you may have carpel tunnel syndrome or neck related issues.

This is carpal tunnel syndrome secondary to overuse of the same in wrist flexion posture. For domestic activities related to non dominant hand, plus mobile holding for prolonged duration.

Numbness in Hand is Majorly Due to Two Reasons Either Due to Cervical Problem or Frozen Shoulder. You Have to Check For it, Or There May Be Both the Problems Together. I am Sending Video Links For Both the Problems as Explaining Them in Exact Terms in Writing May Lead to Confusion or Wrong Treatment.

Dear, First control your thyroid , you have only numbness in hand or above , do you have both hand or single hand.may it  Nerve problem. Are you job holder

Do you have numbness in one hand or both? How long do you have this problem? Whether the numbness is from shoulder to fingers?

Consultant Physiotherapist dear for proper diagnosis n treatment

You might have deficiency of vit b12 Also correct your posture. Do a little exercise in the morning.

Visit physiotherapy centre for proper diagnosis and treatment

hello ur sypmtoms are suggestive of carpal tunnel syndrome avoid the positions in which ur wrist is being kept in flexed / bend position for long time u can visit neary physiotherapist for ultrasound / tens therapy for local application followed by strengthening / stretching exs if the numbness in the hand increases then surgical option is best which is to release the entraped median nerve

Hi .. This seems to be carpal tunnel syndrome .. Do few  gentle wrist  n finger ex's.. Hot fomentation Avoid position which give u numbness like sustained gripping,holding objects tightly, forceful gripping etc

Hypothyroidism can cause numbness due to neuropathy. This can happen when too little of thyroid hormones. Please check this, if low with a general practitioner online. Also, when having your wrist lightly bend if the numbenss comes on try to use a pillow or towel to keep the wrist straight. Do you have pins and needles or numbness in the night? If you are kneading dough and there are symptoms after then it could be issues with carpal tunnel. This might in some cases if vad requure a splint.

There can be different reasons. Need proper diagnosis and assessment done for the same. It can be due to nerve compression. Applying hot water bag three times a day 10 min-15min. Use pain'relieving gel or diclofenac gel or volini gel. Start doing exercises like shoulder strengthening exercises. Neck isometric exercises. Shoulder stretching. Wrist strengthening exercises.